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UNITEDSTATES
SECURITIESANDEXCHANGECOMMISSION
Washington,D.C.20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-08621

Name of Fund: BlackRock MuniHoldings New Jersey Insured Fund, Inc. (MUJ)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Anne F. Ackerley, Chief Executive Officer, BlackRock
MuniHoldings New Jersey Insured Fund, Inc., 55 East 52nd Street, New York, NY 10055.

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 07/31/2010

Date of reporting period: 04/30/2010

Item 1 – Schedule of Investments

Schedule of Investments April 30, 2010 (Unaudited)

BlackRock MuniHoldings New Jersey Insured Fund, Inc. (MUJ)

(Percentages shown are based on Net Assets)

     Par   
Municipal Bonds    (000)  Value 
New Jersey — 135.7%       
Corporate — 1.6%       
New Jersey EDA, RB, Disposal, Waste M     
   Management of New Jersey, Series A,     
   AMT, 5.30%, 6/01/15  $ 2,500  $ 2,695,550 
New Jersey EDA, Refunding RB, New       
   Jersey American Water Co., Series A,     
   AMT, 5.70%, 10/01/39    2,500  2,553,200 
      5,248,750 
County/City/Special District/School District — 21.3%   
Borough of Hopatcong New Jersey, GO,     
   Refunding, Sewer (AMBAC),       
 4.50%, 8/01/33    2,690  2,722,011 
Camden County Improvement Authority,     
   RB (AGM), 5.50%, 9/01/16 (a)    1,540  1,567,027 
City of Perth Amboy New Jersey, GO,       
   CAB (AGM) (b):       
5.06%, 7/01/32    4,605  4,235,080 
5.07%, 7/01/33    1,395  1,279,606 
5.11%, 7/01/37    1,470  1,337,920 
County of Middlesex New Jersey, COP       
   (NPFGC), 5.25%, 6/15/23    1,550  1,556,572 
County of Middlesex New Jersey, COP,     
   Refunding (NPFGC), 5.50%, 8/01/16  1,375  1,452,440 
East Orange Board of Education, COP       
   (AGM), 5.50%, 8/01/12    6,715  7,065,859 
Essex County Improvement Authority,       
   LRB, County Correctional Facility       
   Project, Series A (FGIC), 5.00%,       
   10/01/13 (a)    4,400  4,960,076 
Essex County Improvement Authority,       
   RB, County Correctional Facility       
   Project (FGIC), 6.00%, 10/01/10 (a)  4,000  4,094,440 
Essex County Improvement Authority,       
   Refunding RB, Project Consolidation     
   (NPFGC), 5.50%, 10/01/27    250  284,850 
Hudson County Improvement Authority,     
   RB, Harrison Parking Facility Project,     
   Series C (AGC), 5.38%, 1/01/44    3,600  3,839,796 
Hudson County Improvement Authority,     
   Refunding RB, Hudson County Lease     
   Project (NPFGC), 5.38%, 10/01/24    2,530  2,550,417 
Middlesex County Improvement       
   Authority, RB, Senior Citizens Housing     
   Project, AMT (AMBAC), 5.50%,       
   9/01/30    500  500,300 

     Par   
Municipal Bonds    (000)  Value 
New Jersey (continued)       
County/City/Special District/School District (concluded)   
Monmouth County Improvement       
   Authority, Refunding RB,       
   Governmental Loan (AMBAC):       
       5.35%, 12/01/10 (a)  $ 695   $ 715,662 
       5.38%, 12/01/10 (a)    535  550,980 
       5.35%, 12/01/17    845  863,784 
       5.38%, 12/01/18    935  955,907 
Morristown Parking Authority, RB       
   (NPFGC):       
       5.00%, 8/01/30    1,830  1,925,270 
       5.00%, 8/01/33    3,000  3,125,670 
New Jersey State Transit Corp., COP,       
   Subordinate, Federal Transit       
   Administration Grants, Series A       
   (AGM), 5.00%, 9/15/21    2,000  2,113,220 
Newark Housing Authority, Refunding       
   RB, Newark Redevelopment Project       
   (NPFGC), 4.38%, 1/01/37    620  586,446 
North Bergen Township Board Of       
   Education, COP (AGM) (a):       
       6.00%, 12/15/10    1,000  1,045,740 
       6.25%, 12/15/10    3,260  3,414,198 
Salem County Improvement Authority,       
   RB, Finlaw Street Office Building       
   (AGM), 5.38%, 8/15/28    500  543,080 
South Jersey Port Corp., Refunding RB:     
       4.50%, 1/01/15    3,750  3,914,700 
       4.50%, 1/01/16    1,920  1,985,798 
Township of West Deptford New Jersey,     
   GO (FGIC), 5.63%, 9/01/10 (a)    8,580  8,734,183 
      67,921,032 
Education — 19.3%       
New Jersey EDA, RB:       
       International Center For Public       
       Health Project, University of       
       Medicine and Dentistry (AMBAC),       
       6.00%, 6/01/32    5,000  4,999,750 
       School Facilities Construction,       
       Series Y, 5.00%, 9/01/33    3,000  3,092,610 

Portfolio Abbreviations

To simplify the listings of portfolio holdings in the Schedule of Investments, the names and descriptions of many of the securities have been abbreviated
according to the following list:

AGC  Assured Guaranty Corp.  EDA  Economic Development Authority 
AGM  Assured Guaranty Municipal Corp.  GO  General Obligation Bonds 
AMBAC  American Municipal Bond Assurance Corp.  FGIC  Financial Guaranty Insurance Co. 
AMT  Alternative Minimum Tax (subject to)  FSA  Financial Security Assurance Inc. 
BHAC  Berkshire Hathaway Assurance Corp.  LRB  Lease Revenue Bonds 
CAB  Capital Appreciation Bonds  NPFGC  National Public Finance Guarantee Corp. 
CIFG  CDC IXIS Financial Guaranty  RB  Revenue Bonds 
COP  Certificates of Participation  S/F  Single-Family 
    VRDN  Variable Rate Demand Notes 

BLACKROCK MUNIHOLDINGS NEW JERSEY INSURED FUND, INC.

APRIL 30, 2010

1

Schedule of Investments (continued)

BlackRock MuniHoldings New Jersey Insured Fund, Inc. (MUJ)
(Percentages shown are based on Net Assets)

     Par   
Municipal Bonds    (000)  Value 
New Jersey (continued)       
Education (concluded)       
New Jersey Educational Facilities       
   Authority, RB:       
       Montclair State University, Series A     
       (AMBAC), 5.00%, 7/01/21  $ 1,200  $ 1,263,624 
       Montclair State University, Series A     
       (AMBAC), 5.00%, 7/01/22    2,880  3,027,082 
       Richard Stockton College, Series F     
       (NPFGC), 5.00%, 7/01/31    2,625  2,656,762 
       Rowan University, Series C (NPFGC),     
       5.00%, 7/01/14 (a)    3,260  3,729,375 
       Rowan University, Series C (NPFGC),     
       5.13%, 7/01/14 (a)    3,615  4,153,707 
New Jersey Educational Facilities       
   Authority, Refunding RB:       
       College of New Jersey, Series D       
       (AGM), 5.00%, 7/01/35    9,540  9,875,713 
       Montclair State University, Series J     
       (NPFGC), 4.25%, 7/01/30    3,775  3,560,618 
       Ramapo College, Series I (AMBAC),     
       4.25%, 7/01/31    1,250  1,172,463 
       Ramapo College, Series I (AMBAC),     
       4.25%, 7/01/36    900  824,868 
       Rowan University, Series C (FGIC),     
       5.25%, 7/01/11 (a)    790  841,547 
       Rowan University, Series C (NPFGC),     
       5.25%, 7/01/17    2,135  2,247,493 
       Rowan University, Series C (NPFGC),     
       5.25%, 7/01/18    2,535  2,665,527 
       Rowan University, Series C (NPFGC),     
       5.25%, 7/01/19    2,370  2,489,187 
       Stevens Institute of Technology,       
       Series A, 5.00%, 7/01/27    2,800  2,821,616 
       Stevens Institute of Technology,       
       Series A, 5.00%, 7/01/34    900  876,537 
       William Paterson University,       
       Series C (AGC), 5.00%, 7/01/28    250  263,520 
       William Paterson University,       
       Series C (AGC), 4.75%, 7/01/34    4,000  4,022,640 
University of Medicine & Dentistry of       
   New Jersey, COP (NPFGC), 5.00%,       
   6/15/29    2,000  1,932,960 
University of Medicine & Dentistry of       
   New Jersey, RB, Series A (AMBAC),       
   5.50%, 12/01/27    4,740  4,782,897 
      61,300,496 
Health — 14.3%       
New Jersey Health Care Facilities       
   Financing Authority, RB:       
       Greystone Park Psychiatric Hospital     
       (AMBAC), 5.00%, 9/15/23    10,775  11,029,182 

     Par   
Municipal Bonds    (000)  Value 
New Jersey (continued)       
Health (concluded)       
New Jersey Health Care Facilities       
Financing Authority, RB (concluded):     
       Meridian Health, Series I (AGC),       
       5.00%, 7/01/38  $ 780  $ 787,761 
       Meridian Health, Series II (AGC),       
       5.00%, 7/01/38    7,400  7,473,630 
       Meridian Health, Series V (AGC),       
       5.00%, 7/01/38    3,960  3,999,402 
       Society of The Valley Hospital       
       (AMBAC), 5.38%, 7/01/25    2,820  2,645,809 
       South Jersey Hospital, 6.00%,       
       7/01/12 (a)    5,440  6,039,651 
       Virtua Health (AGC), 5.50%,       
       7/01/38    1,000  1,060,500 
New Jersey Health Care Facilities       
   Financing Authority, Refunding RB:       
       AHS Hospital Corp., Series A       
       (AMBAC), 6.00%, 7/01/13 (c)    4,000  4,577,760 
       Atlantic City Medical Center, 5.75%,     
       7/01/12 (a)    1,525  1,673,474 
       Atlantic City Medical Center, 6.25%,     
       7/01/12 (a)    530  587,256 
       Atlantic City Medical System,       
       6.25%, 7/01/17    925  972,693 
       Atlantic City Medical System,       
       5.75%, 7/01/25    1,975  2,018,786 
       Hackensack University Medical       
       Center (AGC), 5.13%, 1/01/27    1,500  1,555,215 
       Meridian Health System Obligation     
       Group (AGM), 5.38%, 7/01/24    1,000  1,001,110 
      45,422,229 
Housing — 5.1%       
New Jersey State Housing & Mortgage     
   Finance Agency, RB:       
       Capital Fund Program, Series A       
       (AGM), 4.70%, 11/01/25    10,840  11,004,009 
       Series AA, 6.50%, 10/01/38    2,720  2,968,173 
New Jersey State Housing & Mortgage     
   Finance Agency, Refunding RB, S/F       
   Housing, Series T, AMT, 4.70%,       
   10/01/37    800  751,872 
Newark Housing Authority, RB, South       
   Ward Police Facility (AGC):       
       5.75%, 12/01/30    850  910,749 
       6.75%, 12/01/38    500  569,235 
      16,204,038 
State — 49.2%       
Garden State Preservation Trust, RB       
   (AGM):       
       CAB, Series B, 5.11%, 11/01/23 (d)  9,000  5,049,000 
       CAB, Series B, 5.20%, 11/01/25 (d)  10,000  5,036,100 
       Election of 2005, Series A, 5.80%,     
       11/01/21    1,960  2,282,734 

2

BLACKROCK MUNIHOLDINGS NEW JERSEY INSURED FUND, INC.

APRIL 30, 2010

Schedule of Investments (continued)

BlackRock MuniHoldings New Jersey Insured Fund, Inc. (MUJ)
(Percentages shown are based on Net Assets)

  Par   
Municipal Bonds  (000)  Value 
New Jersey (continued)     
State (continued)     
Garden State Preservation Trust, RB     
   (concluded):     
       Election of 2005, Series A, 5.80%,     
       11/01/23  $ 2,730  $ 3,185,910 
Garden State Preservation Trust,     
   Refunding RB, Series C (AGM):     
       5.25%, 11/01/20  5,000  5,967,300 
       5.25%, 11/01/21  7,705  9,217,491 
New Jersey EDA, RB:     
       Cigarette Tax, 5.63%, 6/15/19  2,700  2,700,864 
       Cigarette Tax (Radian), 5.75%,     
       6/15/29  2,000  1,963,480 
       Cigarette Tax (Radian), 5.50%,     
       6/15/31  585  554,206 
       Cigarette Tax (Radian), 5.75%,     
       6/15/34  1,180  1,142,547 
       Liberty State Park Project, Series C     
       (AGM), 5.00%, 3/01/22  2,670  2,859,730 
       Motor Vehicle Surcharge, Series A     
       (NPFGC), 5.25%, 7/01/26  7,500  7,954,275 
       Motor Vehicle Surcharge, Series A     
       (NPFGC), 5.25%, 7/01/33  11,105  11,303,668 
       Motor Vehicle Surcharge, Series A     
       (NPFGC), 5.00%, 7/01/34  2,000  1,958,640 
       School Facilities Construction,     
       Series L (AGM), 5.00%, 3/01/30  9,000  9,311,670 
       School Facilities Construction,     
       Series O, 5.25%, 3/01/23  1,420  1,522,893 
       School Facilities Construction,     
       Series Z (AGC), 6.00%, 12/15/34  2,800  3,168,508 
       School Facilities, Series U (AMBAC),     
       5.00%, 9/01/37  2,500  2,550,600 
       State Office Buildings Projects     
       (AMBAC), 6.00%, 6/15/10 (a)  3,000  3,021,330 
       State Office Buildings Projects     
       (AMBAC), 6.25%, 6/15/10 (a)  4,620  4,654,327 
New Jersey EDA, Refunding RB, School     
   Facilities Construction, Series N-1     
   (NPFGC), 5.50%, 9/01/27  1,000  1,110,460 
New Jersey Educational Facilities     
   Authority, RB, Series A (a):     
       Capital Improvement Fund (AGM),     
       5.75%, 9/01/10  9,420  9,593,234 
       Higher Education Capital     
       Improvement (AMBAC), 5.13%,     
       9/01/12  5,500  6,045,600 
New Jersey Sports & Exposition     
   Authority, RB, Series A (NPFGC),     
   6.00%, 3/01/13  2,400  2,410,392 
New Jersey Sports & Exposition     
   Authority, Refunding RB (NPFGC):     
       5.50%, 3/01/21  5,890  6,647,690 
       5.50%, 3/01/22  3,000  3,386,070 

  Par   
Municipal Bonds  (000)             Value 
New Jersey (continued)     
State (concluded)     
New Jersey Transportation Trust Fund     
   Authority, RB:     
       CAB, Transportation System, Series     
       C (AGM), 4.72%, 12/15/32 (d)  $ 4,050  $ 1,159,799 
       CAB, Transportation System, Series     
       C (AMBAC), 5.05%, 12/15/35 (d)  1,400  300,202 
       CAB, Transportation System, Series     
       C (AMBAC), 5.05%, 12/15/36 (d)  5,500  1,104,895 
       Transportation System, Series A,     
       6.00%, 6/15/10 (a)  5,000  5,035,550 
       Transportation System, Series A     
       (AGC), 5.63%, 12/15/28  2,000  2,230,360 
       Transportation System, Series D     
       (AGM), 5.00%, 6/15/19  7,800  8,354,502 
New Jersey Transportation Trust Fund     
   Authority, Refunding RB:     
       Transportation System, Series A     
       (AGM), 5.25%, 12/15/20  10,750  12,103,747 
       Transportation System, Series B     
       (NPFGC), 5.50%, 12/15/21  9,165  10,479,444 
State of New Jersey, COP, Equipment     
   Lease Purchase, Series A, 5.25%,     
   6/15/27  1,080  1,131,775 
    156,498,993 
Tobacco — 1.8%     
Tobacco Settlement Financing Corp.     
   New Jersey, RB, 7.00%, 6/01/13 (a)  4,755  5,591,690 
Transportation — 18.8%     
Delaware River Port Authority     
   Pennsylvania & New Jersey,     
   RB (AGM):     
       5.50%, 1/01/12  5,000  5,018,350 
       5.63%, 1/01/13  6,000  6,022,740 
Delaware River Port Authority, RB, Port     
   District Project, Series B (AGM),     
   5.63%, 1/01/26  2,425  2,427,328 
New Jersey State Turnpike Authority,     
   RB, Growth & Income Securities,     
   Series B (AMBAC), 6.34%,     
   1/01/35 (d)  7,615  6,102,966 
New Jersey State Turnpike Authority,     
   Refunding RB:     
       Series A (AGM), 5.25%, 1/01/29  2,000  2,261,400 
       Series A (AGM), 5.25%, 1/01/30  4,000  4,523,640 
       Series A (BHAC), 5.25%, 1/01/29  500  580,905 
       Series C (NPFGC), 6.50%, 1/01/16  910  1,075,911 
       Series C (NPFGC), 6.50%,     
       1/01/16 (c)  4,355  5,036,906 
       Series C-2005 (NPFGC), 6.50%,     
       1/01/16 (c)  255  314,512 
New Jersey Transportation Trust Fund     
   Authority, RB:     
       Transportation System, Series A     
       (AMBAC), 5.00%, 12/15/32  1,425  1,456,635 

BLACKROCK MUNIHOLDINGS NEW JERSEY INSURED FUND, INC.

APRIL 30, 2010

3

Schedule of Investments (continued)

BlackRock MuniHoldings New Jersey Insured Fund, Inc. (MUJ)

(Percentages shown are based on Net Assets)

     Par   
Municipal Bonds    (000)             Value 
New Jersey (concluded)       
Transportation (concluded)       
New Jersey Transportation Trust Fund     
   Authority, RB (concluded):       
       Transportation System, Series C,       
       5.50%, 6/15/13 (a)  $ 780  $ 885,058 
Port Authority of New York & New       
   Jersey, RB, Special Project, JFK       
   International Air Terminal, Series 6,       
   AMT (NPFGC):       
       6.25%, 12/01/11    13,500  13,995,450 
       6.25%, 12/01/15    1,500  1,584,345 
       5.75%, 12/01/25    3,000  2,992,140 
Port Authority of New York & New       
   Jersey, Refunding RB, Consolidated,     
   152nd Series, AMT, 5.75%,       
   11/01/30    5,175  5,526,848 
      59,805,134 
Utilities — 4.3%       
Atlantic Highlands Highland Regional       
   Sewage Authority, Refunding RB       
   (NPFGC), 5.50%, 1/01/20    1,875  1,941,113 
Essex County Utilities Authority,       
   Refunding RB (AGC), 4.13%, 4/01/22  2,000  2,038,560 
New Jersey EDA, RB, Series A, American     
   Water, AMT (AMBAC), 5.25%,       
   11/01/32    3,000  2,918,940 
North Hudson Sewerage Authority,       
   Refunding RB, Series A (NPFGC),       
   5.13%, 8/01/20    4,335  4,494,311 
Rahway Valley Sewerage Authority, RB,     
   CAB, Series A (NPFGC), 4.79%,       
   9/01/28 (d)    6,600  2,388,408 
      13,781,332 
Total Municipal Bonds in New Jersey      431,773,694 
Puerto Rico — 8.9%       
Health — 1.1%       
Puerto Rico Industrial Tourist       
   Educational Medical & Environmental     
   Control Facilities Financing       
   Authority, RB, Series A:       
       Hospital Auxilio Mutuo Obligation       
       Group (NPFGC), 6.25%, 7/01/24    1,780  1,781,549 
       Hospital De La Concepcion,       
       6.50%, 11/15/20    1,750  1,800,435 
      3,581,984 
Housing — 0.2%       
Puerto Rico Commonwealth       
   Infrastructure Financing Authority, RB,     
   CAB, Series A (AMBAC), 4.36%,       
   7/01/37 (d)    4,000  635,320 

     Par   
Municipal Bonds    (000)  Value 
Puerto Rico (concluded)       
State — 2.7%       
Puerto Rico Housing Finance Authority,     
   Refunding RB, Subordinate, Capital     
   Fund Modernization,       
   5.13%, 12/01/27  $ 6,285   $ 6,273,876 
Puerto Rico Public Buildings Authority,     
   Refunding RB, Government Facilities,     
   Series M-3 (NPFGC), 6.00%, 7/01/27   2,125  2,245,487 
      8,519,363 
Transportation — 1.7%       
Puerto Rico Highway & Transportation     
   Authority, Refunding RB, Series CC       
   (AGC), 5.50%, 7/01/31     5,000  5,440,700 
Utilities — 3.2%       
Puerto Rico Aqueduct & Sewer       
   Authority, RB, Senior Lien, Series A       
   (AGC), 5.13%, 7/01/47     6,120  6,143,072 
Puerto Rico Electric Power Authority, RB,     
   Series RR (CIFG), 5.00%, 7/01/28     4,100  4,123,821 
      10,266,893 
Total Municipal Bonds in Puerto Rico      28,444,260 
 Total Municipal Bonds – 144.6%                                             460,217,954  
Municipal Bonds Transferred to Tender     
Option Bond Trusts (e)       
New Jersey — 7.1%       
Housing — 1.6%       
New Jersey State Housing & Mortgage     
   Finance Agency, RB, Capital Fund       
   Program, Series A (AGM),       
   5.00%, 5/01/27     4,790  5,158,926 
State — 3.6%       
Garden State Preservation Trust, RB,       
   Election of 2005, Series A (AGM),       
   5.75%, 11/01/28     9,160  11,282,555 
Transportation — 1.9%       
Port Authority of New York & New       
   Jersey, Refunding RB, Consolidated,     
   152nd Series, AMT, 5.25%,       
   11/01/35     5,998  6,127,590 
Total Municipal Bonds Transferred to     
Tender Option Bond Trusts – 7.1%      22,569,071 
Total Long-Term Investments       
(Cost – $467,159,638) – 151.7%      482,787,025 

4

BLACKROCK MUNIHOLDINGS NEW JERSEY INSURED FUND, INC.

APRIL 30, 2010

Schedule of Investments (concluded)

BlackRock MuniHoldings New Jersey Insured Fund, Inc. (MUJ)

(Percentages shown are based on Net Assets)

  Par   
Short-Term Securities  (000)                 Value 
Puerto Rico — 1.6%     
Commonwealth of Puerto Rico, GO,     
   Refunding, VRDN, Series B-4 (FSA),     
   0.32%, 5/07/10 (h)  $ 5,000  $ 5,000,000 
  Shares   
Money Market Fund — 3.3%     
CMA New Jersey Municipal Money Fund,     
   0.04% (f)(g)  10,646,108  10,646,108 
Total Short-Term Securities     
(Cost – $15,646,108) – 4.9%    15,646,108 
Total Investments     
(Cost – $482,805,746*) – 156.6%    498,433,133 
Other Assets Less Liabilities – 1.8%    5,877,492 
Liability for Trust Certificates, Including Interest   
Expense and Fees Payable – (4.2)%    (13,281,823) 
Preferred Shares, at Redemption Value – (54.2)%  (172,713,733) 
Net Assets Applicable to Common Shares – 100.0%  $ 318,315,069 

* The cost and unrealized appreciation (depreciation) of investments as of

April 30, 2010, as computed for federal income tax purposes, were as

Aggregate follows: cost  $ 469,542,816 
Gross unrealized appreciation  $ 18,544,429 
Gross unrealized depreciation  (2,917,042) 
Net unrealized appreciation  $ 15,627,387 

(a) US government securities, held in escrow, are used to pay interest on this
security as well as to retire the bond in full at the date indicated, typically
at a premium to par.
(b) Represents a step-up bond that pays an initial coupon rate for the first
period and then a lower coupon rate for the following periods. Rate
shown reflects the current yield.
(c) Security is collateralized by Municipal or US Treasury obligations.
(d) Represents a zero-coupon bond. Rate shown reflects the current yield as
of report date.
(e) Securities represent bonds transferred to a tender option bond trust in
exchange for which the Fund acquired residual interest certificates.
These securities serve as collateral in a financing transaction.
(f) Investments in companies considered to be an affiliate of the Fund
during the period, for purposes of Section 2(a)(3) of the Investment
Company Act of 1940, were as follows:

  Shares Held    Shares Held   
  at July 31,  Net  at April 30,   
Affiliate  2009  Activity  2010  Income 
CMA New Jersey         
   Municipal         
   Money Fund  3,311,943  7,334,165  10,646,108  $1,327 

(g) Represents the current yield as of report date.
(h) Variable rate security. Rate shown is as of report date and maturity
shown is the date the principal owed can be recovered through demand.

• Fair Value Measurements - Various inputs are used in determining the fair
value of investments, which are as follows:

•Level 1 — price quotations in active markets/exchanges for identical
assets and liabilities

•Level 2 — other observable inputs (including, but not limited to: quoted
prices for similar assets or liabilities in markets that are active, quoted
prices for identical or similar assets or liabilities in markets that are not
active, inputs other than quoted prices that are observable for the
assets or liabilities (such as interest rates, yield curves, volatilities,
prepayment speeds, loss severities, credit risks and default rates) or
other market-corroborated inputs)

•Level 3 — unobservable inputs based on the best information available
in the circumstances, to the extent observable inputs are not available
(including the Fund's own assumptions used in determining the fair
value of investments)

The inputs or methodologies used for valuing securities are not necessarily
an indication of the risk associated with investing in those securities. For
information about the Fund's policy regarding valuation of investments and
other significant accounting policies, please refer to the Fund’s most recent
financial statements as contained in its semi-annual report.

The following table summarizes the inputs used as of April 30, 2010 in
determining the fair valuation of the Fund's investments:

Investments in Securities
Valuation Inputs  Level 1      Level 2  Level 3  Total 
Assets:         
Long-Term         
 Investments1  —     $ 482,787,025           —   $ 482,787,025 
Short-Term         
 Securities  $ 10,646,108  5,000,000           —  15,646,108 
Total  $ 10,646,108   $ 487,787,025           —   $ 498,433,133 

1 See above Schedule of Investments for values in each sector.

BLACKROCK MUNIHOLDINGS NEW JERSEY INSURED FUND, INC.

APRIL 30, 2010

5

Item 2 – Controls and Procedures

2(a) – The registrant's principal executive and principal financial officers or persons performing similar
functions have concluded that the registrant's disclosure controls and procedures (as defined in Rule
30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”)) are effective as
of a date within 90 days of the filing of this report based on the evaluation of these controls and
procedures required by Rule 30a-3(b) under the 1940 Act and Rule 13(a)-15(b) under the Securities
Exchange Act of 1934, as amended.

2(b) – There were no changes in the registrant's internal control over financial reporting (as defined in Rule
30a-3(d) under the 1940 Act) that occurred during the registrant's last fiscal quarter that have
materially affected, or are reasonably likely to materially affect, the registrant's internal control over
financial reporting.

Item 3 – Exhibits

Certifications – Attached hereto

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company
Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned,
thereunto duly authorized.

BlackRock MuniHoldings New Jersey Insured Fund, Inc.

By: /s/ Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer of
BlackRock MuniHoldings New Jersey Insured Fund, Inc.

Date: June 28, 2010

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company
Act of 1940, this report has been signed below by the following persons on behalf of the registrant
and in the capacities and on the dates indicated.

By: /s/ Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer (principal executive officer) of
BlackRock MuniHoldings New Jersey Insured Fund, Inc.

Date: June 28, 2010

By: /s/ Neal J. Andrews
Neal J. Andrews
Chief Financial Officer (principal financial officer) of
BlackRock MuniHoldings New Jersey Insured Fund, Inc.

Date: June 28, 2010