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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 811-06570

Name of Fund: BlackRock MuniYield New Jersey Fund, Inc. (MYJ)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Anne F. Ackerley, Chief Executive Officer, BlackRock
MuniYield New Jersey 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 MuniYield New Jersey Fund, Inc. (MYJ)
(Percentages shown are based on Net Assets)

     Par   
Municipal Bonds    (000)  Value 
New Jersey — 132.2%       
Corporate — 3.5%       
New Jersey EDA, Refunding RB, New       
   Jersey American Water Co., Series A,     
   AMT, 5.70%, 10/01/39  $ 2,925  $ 2,987,244 
Salem County Utilities Authority,       
   Refunding RB, Atlantic City Electric,       
   Series A, 4.88%, 6/01/29    4,550  4,579,848 
      7,567,092 
County/City/Special District/School District — 19.5%   
Burlington County Bridge Commission,     
   RB, Governmental Leasing Program,     
   5.25%, 8/15/12 (a)    1,000  1,100,740 
City of Perth Amboy New Jersey, GO,       
   CAB (AGM) (b):       
       5.07%, 7/01/33    1,575  1,444,716 
       5.07%, 7/01/34    1,925  1,761,183 
County of Hudson New Jersey, COP,       
   Refunding (NPFGC), 6.25%,       
   12/01/16    1,500  1,720,380 
Essex County Improvement Authority,       
   Refunding RB, Project Consolidation     
   (NPFGC), 5.50%, 10/01/29    5,085  5,738,626 
Hudson County Improvement Authority,     
   RB, Harrison Parking Facility Project,     
   Series C (AGC), 5.38%, 1/01/44    4,800  5,119,728 
Hudson County Improvement Authority,     
   Refunding RB, Hudson County Lease     
   Project (NPFGC), 5.38%, 10/01/24    4,500  4,536,315 
Middlesex County Improvement       
   Authority, RB:       
       Golf Course Projects, 5.25%,       
       6/01/22    1,455  1,612,460 
       Senior, Heldrich Center Hotel,       
       Series A, 5.00%, 1/01/20    655  370,258 
Monmouth County Improvement       
   Authority, RB, Governmental Loan       
   (AMBAC):       
       5.00%, 12/01/11 (a)    1,020  1,091,186 
       5.00%, 12/01/11 (a)    1,065  1,139,326 
       5.00%, 12/01/15    1,215  1,251,705 
       5.00%, 12/01/16    1,280  1,311,821 
Morristown Parking Authority, RB       
   (NPFGC), 4.50%, 8/01/37    585  584,052 
Newark Housing Authority, Refunding       
   RB, Newark Redevelopment Project     
   (NPFGC), 4.38%, 1/01/37    2,875  2,719,405 

     Par   
Municipal Bonds    (000)  Value 
New Jersey (continued)       
County/City/Special District/School District (concluded)   
Salem County Improvement Authority,     
   RB, Finlaw Street Office Building       
   (AGM):       
       5.38%, 8/15/28  $ 500  $ 543,080 
       5.25%, 8/15/38    500  527,825 
South Jersey Port Corp., Refunding RB:     
       4.75%, 1/01/18    4,280  4,406,217 
       4.85%, 1/01/19    2,485  2,553,064 
       5.00%, 1/01/20    2,000  2,053,620 
      41,585,707 
Education — 17.8%       
New Jersey EDA, RB, School Facilities     
   Construction, Series CC-2 (c):       
       5.00%, 12/15/31    1,700  1,782,535 
       5.00%, 12/15/32    1,300  1,359,865 
New Jersey Educational Facilities       
   Authority, RB:       
       Georgian Court College Project,       
       Series C, 6.50%, 7/01/13 (a)    2,000  2,330,000 
       Montclair State University, Series J,     
       5.25%, 7/01/38    1,140  1,183,616 
       Rider University, Series A (Radian),     
       5.50%, 7/01/23    1,255  1,281,568 
       Rider University, Series A (Radian),     
       5.25%, 7/01/34    1,450  1,381,270 
       Rider University, Series C (Radian),     
       5.00%, 7/01/37    1,750  1,627,203 
New Jersey Educational Facilities       
   Authority, Refunding RB:       
       College of New Jersey, Series D       
       (AGM), 5.00%, 7/01/35    6,115  6,330,187 
       Georgian Court University, Series D,     
       5.25%, 7/01/37    1,000  970,360 
       Montclair State University, Series L     
       (NPFGC), 5.00%, 7/01/14 (a)    5,305  6,068,814 
       Ramapo College, Series I (AMBAC),     
       4.25%, 7/01/31    750  703,478 
       Ramapo College, Series I (AMBAC),     
       4.25%, 7/01/36    810  742,381 
       Rider University (Radian), 5.00%,     
       7/01/17    1,000  1,017,610 
       Rowan University, Series B (AGC),     
       5.00%, 7/01/24    1,800  1,937,286 
       University of Medicine & Dentistry,     
       Series B, 7.13%, 12/01/23    1,300  1,501,942 
       University of Medicine & Dentistry,     
       Series B, 7.50%, 12/01/32    1,625  1,861,129 

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.  FGIC  Financial Guaranty Insurance Co. 
AMBAC  American Municipal Bond Assurance Corp.  GO  General Obligation Bonds 
AMT  Alternative Minimum Tax (subject to)  NPFGC  National Public Finance Guarantee Corp. 
CAB  Capital Appreciation Bonds  RB  Revenue Bonds 
COP  Certificates of Participation  S/F  Single-Family 

BLACKROCK MUNIYIELD NEW JERSEY FUND, INC.

APRIL 30, 2010

1

Schedule of Investments (continued)

BlackRock MuniYield New Jersey Fund, Inc. (MYJ)
(Percentages shown are based on Net Assets)

     Par   
Municipal Bonds    (000)  Value 
New Jersey (continued)       
Education (concluded)       
New Jersey Higher Education Assistance     
   Authority, Refunding RB, Series 1A:       
       5.00%, 12/01/25  $ 1,035  $ 1,061,920 
       5.00%, 12/01/26    645  657,771 
       5.25%, 12/01/32    900  913,500 
New Jersey State Higher Education       
   Assistance Authority, RB, Series A,       
   AMT (AMBAC), 5.30%, 6/01/17    3,170  3,172,948 
      37,885,383 
Health — 18.8%       
New Jersey EDA, RB:       
       CAB, St. Barnabas Health, Series A     
       (NPFGC), 6.25%, 7/01/24 (d)    3,850  1,380,649 
       Masonic Charity Foundation of New     
       Jersey, 5.25%, 6/01/24    1,425  1,443,953 
       Masonic Charity Foundation of New     
       Jersey, 5.25%, 6/01/32    685  661,525 
New Jersey EDA, Refunding RB, First       
   Mortgage, Winchester, Series A:       
       5.75%, 11/01/24    2,500  2,503,925 
       5.80%, 11/01/31    1,000  989,100 
New Jersey Health Care Facilities       
   Financing Authority, RB:       
       Children's Specialized Hospital,       
       Series A, 5.50%, 7/01/36    1,540  1,480,048 
       Health System, Catholic Health       
       East, Series A, 5.38%, 11/15/12 (a)  1,100  1,219,449 
       Hospital Asset Transformation       
       Program, Series A, 5.25%,       
       10/01/38    1,300  1,312,272 
       Hunterdon Medical Center, Series A,     
       5.13%, 7/01/35    1,950  1,871,337 
       Meridian Health, Series I (AGC),       
       5.00%, 7/01/38    1,000  1,009,950 
       Pascack Valley Hospital Association,     
       6.63%, 7/01/36 (e)(f)    1,845  18 
       Robert Wood University (AMBAC),       
       5.70%, 7/01/20    4,000  4,008,680 
       Southern Ocean County Hospital       
       (Radian), 5.13%, 7/01/31    2,000  1,756,820 
       Virtua Health (AGC), 5.50%,       
       7/01/38    2,500  2,651,250 
New Jersey Health Care Facilities       
   Financing Authority, Refunding RB:       
       Atlantic City Medical Center, 5.75%,     
       7/01/12 (a)    1,060  1,163,202 
       Atlantic City Medical Center, 6.25%,     
       7/01/12 (a)    500  554,015 
       Atlantic City Medical System,       
       6.25%, 7/01/17    520  546,811 
       Atlantic City Medical System,       
       5.75%, 7/01/25    520  531,528 
       CAB, St. Barnabas Health, Series B,     
       5.90%, 7/01/30 (d)    2,000  410,280 

  Par   
Municipal Bonds  (000)  Value 
New Jersey (continued)     
Health (concluded)     
New Jersey Health Care Facilities     
   Financing Authority,     
   Refunding RB (concluded):     
       CAB, St. Barnabas Health, Series B,     
       5.69%, 7/01/36 (d)  $ 500  $ 60,735 
       CAB, St. Barnabas Health, Series B,     
       5.17%, 7/01/37 (d)  13,250  1,484,928 
       Capital Health System Obligation     
       Group, Series A, 5.75%,     
       7/01/13 (a)  1,650  1,850,953 
       Meridian Health System Obligation     
       Group (AGM), 5.25%, 7/01/19  1,500  1,502,265 
       Meridian Health System Obligation     
       Group (AGM), 5.38%, 7/01/24  2,250  2,252,497 
       Meridian Health System Obligation     
       Group (AGM), 5.25%, 7/01/29  2,195  2,195,856 
       South Jersey Hospital, 5.00%,     
       7/01/36  385  374,567 
       South Jersey Hospital, 5.00%,     
       7/01/46  1,650  1,572,598 
       St. Barnabas Health Care System,     
       Series A, 5.00%, 7/01/29  4,155  3,375,273 
    40,164,484 
Housing — 16.3%     
New Jersey State Housing & Mortgage     
   Finance Agency, RB:     
       Capital Fund Program, Series A     
       (AGM), 4.70%, 11/01/25  6,950  7,055,154 
       Home Buyer, Series CC, AMT     
       (NPFGC), 5.80%, 10/01/20  4,515  4,670,768 
       S/F Housing, Series CC, 5.00%,     
       10/01/34  3,455  3,477,112 
       S/F Housing, Series U, AMT, 4.95%,     
       10/01/32  700  692,496 
       S/F Housing, Series X, AMT, 4.85%,     
       4/01/16  3,605  3,740,656 
       S/F Housing, Series X, AMT, 5.05%,     
       4/01/18  600  620,406 
       Series A, 4.75%, 11/01/29  2,305  2,284,739 
       Series A, AMT (FGIC), 4.90%,     
       11/01/35  1,365  1,309,376 
       Series AA, 6.50%, 10/01/38  1,735  1,893,301 
New Jersey State Housing & Mortgage     
   Finance Agency, Refunding RB, S/F     
   Housing, Series T, AMT, 4.65%,     
   10/01/32  4,945  4,758,227 
Newark Housing Authority, RB, South     
   Ward Police Facility (AGC):     
       5.75%, 12/01/30  1,115  1,194,689 
       6.75%, 12/01/38  2,670  3,039,715 
    34,736,639 

2 BLACKROCK MUNIYIELD NEW JERSEY FUND, INC.

APRIL 30, 2010

Schedule of Investments (continued)

BlackRock MuniYield New Jersey Fund, Inc. (MYJ)
(Percentages shown are based on Net Assets)

   Par   
Municipal Bonds  (000)  Value 
New Jersey (continued)     
State — 34.3%     
Garden State Preservation Trust, RB     
   (AGM):     
       CAB, Series B, 5.11%, 11/01/23 (d) $  6,860  $ 3,848,460 
       CAB, Series B, 5.25%, 11/01/28 (d)  4,540  1,932,451 
       Election of 2005, Series A, 5.80%,     
       11/01/22  4,300  5,023,303 
New Jersey EDA, RB:     
       Department of Human Services,     
       Pooled, 5.00%, 7/01/12  220  235,954 
       Motor Vehicle Surcharge, Series A     
       (NPFGC), 5.25%, 7/01/33  14,000  14,250,460 
       School Facilities Construction,     
       Series L (AGM), 5.00%, 3/01/30  5,800  6,000,854 
       School Facilities Construction,     
       Series O, 5.25%, 3/01/23  2,400  2,573,904 
       School Facilities Construction,     
       Series P, 5.00%, 9/01/15  3,000  3,345,390 
       School Facilities Construction,     
       Series P, 5.25%, 9/01/16  2,710  3,044,008 
       School Facilities Construction,     
       Series Z (AGC), 5.50%, 12/15/34  3,665  4,007,678 
       School Facilities Construction,     
       Series Z (AGC), 6.00%, 12/15/34  3,600  4,073,796 
New Jersey EDA, Refunding RB, School     
   Facilities Construction, Series AA,     
   5.50%, 12/15/29  3,300  3,577,959 
New Jersey State Transit Corp., COP,     
   Subordinate, Federal Transit     
   Administration Grants, Series B,     
   5.75%, 9/15/14  3,620  3,897,111 
New Jersey Transportation Trust Fund     
   Authority, Transportation System, RB:     
       CAB, Series C (AMBAC), 5.05%,     
       12/15/35 (d)  4,140  887,740 
       Series A, 6.00%, 12/15/38  2,900  3,221,088 
       Series A (AGC), 5.63%, 12/15/28  1,250  1,393,975 
New Jersey Transportation Trust Fund     
   Authority, Transportation System,     
   Refunding RB:     
       Series A, 5.50%, 12/15/21  3,525  4,009,405 
       Series B (NPFGC), 5.50%,     
       12/15/21  5,865  6,706,158 
State of New Jersey, COP, Equipment     
   Lease Purchase, Series A, 5.25%,     
   6/15/28  1,100  1,146,068 
    73,175,762 
Tobacco — 3.0%     
Tobacco Settlement Financing Corp.     
   New Jersey, Refunding RB, Series 1A,     
   4.50%, 6/01/23  6,720  6,418,541 

     Par   
Municipal Bonds    (000)             Value 
New Jersey (concluded)       
Transportation — 11.0%       
New Jersey State Turnpike Authority, RB:     
       Growth & Income Securities,       
       Series B (AMBAC),6.34%,       
       1/01/35 (b)  $ 4,870  $ 3,903,013 
       Series E, 5.25%, 1/01/40     5,475  5,730,682 
New Jersey Transportation Trust Fund     
   Authority, RB, Transportation System,     
   Series A:       
       5.88%, 12/15/38     3,050  3,346,857 
       (AGC), 5.50%, 12/15/38     1,000  1,091,690 
Port Authority of New York & New Jersey,     
   RB, Consolidated, 93rd Series, 6.13%,     
   6/01/94     5,000  6,003,500 
Port Authority of New York & New Jersey,     
   Refunding RB, Consolidated, 152nd     
   Series, AMT, 5.75%, 11/01/30     3,300  3,524,367 
      23,600,109 
Utilities — 8.0%       
Cumberland County Improvement       
   Authority, RB, Series A, 5.00%,       
   1/01/30     1,210  1,193,520 
New Jersey EDA, RB, New Jersey       
   American Water Co., Inc. Project,       
   Series A, AMT (FGIC), 6.88%,       
   11/01/34     6,670  6,674,536 
New Jersey EDA, Refunding RB, United     
   Water of New Jersey Inc., Series B       
   (AMBAC), 4.50%, 11/01/25     4,500  4,682,925 
Rahway Valley Sewerage Authority, RB,     
   CAB, Series A (NPFGC), 4.87%,       
   9/01/31 (d)     6,000  1,781,880 
Union County Utilities Authority,       
   Refunding RB, Senior Lease, Ogden     
   Martin, Series A, AMT (AMBAC):       
       5.38%, 6/01/17     1,585  1,585,792 
       5.38%, 6/01/18     1,175  1,175,388 
      17,094,041 
Total Municipal Bonds in New Jersey      282,227,758 
Puerto Rico — 5.9%       
Housing — 0.9%       
Puerto Rico Housing Finance Authority,     
   Refunding RB, Subordinate, Capital     
   Fund Modernization, 5.13%,       
   12/01/27     1,975  1,971,504 
State — 3.0%       
Puerto Rico Sales Tax Financing Corp.,     
   RB, First Sub-Series A, 5.75%,       
   8/01/37     6,000  6,361,500 

BLACKROCK MUNIYIELD NEW JERSEY FUND, INC.

APRIL 30, 2010

3

Schedule of Investments (continued)

BlackRock MuniYield New Jersey Fund, Inc. (MYJ)
(Percentages shown are based on Net Assets)

           Par   
Municipal Bonds  (000)  Value 
Puerto Rico (concluded)     
Transportation — 1.5%     
Puerto Rico Highway & Transportation     
   Authority, Refunding RB, Series CC     
   (AGC), 5.50%, 7/01/31  $ 3,000  $ 3,264,420 
Utilities — 0.5%     
Puerto Rico Electric Power Authority, RB,     
   Series WW, 5.50%, 7/01/38           1,000  1,027,050 
Total Municipal Bonds in Puerto Rico    12,624,474 
U.S. Virgin Islands — 1.7%     
Corporate — 1.7%     
United States Virgin Islands, Refunding     
   RB, Senior Secured, Hovensa Coker     
   Project, AMT, 6.50%, 7/01/21           3,500  3,545,640 
Total Municipal Bonds in the U.S. Virgin Islands  3,545,640 
 Total Municipal Bonds – 139.8% 298,397,872
Municipal Bonds Transferred to Tender     
Option Bond Trusts (g)     
New Jersey — 4.9%     
State — 3.1%     
Garden State Preservation Trust, RB,     
   Election of 2005, Series A (AGM),     
   5.75%, 11/01/28           5,460  6,725,191 
Transportation — 1.8%     
Port Authority of New York & New Jersey,     
   Refunding RB, Consolidated, 152nd     
   Series, AMT, 5.25%, 11/01/35           3,764  3,845,063 
Total Municipal Bonds Transferred to     
Tender Option Bond Trusts – 4.9%    10,570,254 
Total Long-Term Investments     
 (Cost – $300,178,942) – 144.7%                                           308,968,126
Short-Term Securities  Shares   
CMA New Jersey Municipal Money Fund,     
   0.04% (h)(i)  12,709,014  12,709,014 
Total Short-Term Securities     
(Cost – $12,709,014) – 6.0%    12,709,014 

  Value 
Total Investments   
(Cost – $312,887,956*) – 150.7%  $ 321,677,140 
Other Assets Less Liabilities – 0.3%  598,019 
Liability for Trust Certificates, Including Interest   
lllExpense and Fees Payable – (3.1)%  (6,613,481) 
Preferred Shares, at Redemption Value – (47.9)%  (102,209,433) 
Net Assets Applicable to Common Shares – 100.0%  $ 213,452,245 

* The cost and unrealized appreciation (depreciation) of investments as of
April 30, 2010, as computed for federal income tax purposes, were as

follows:   
Aggregate cost  $ 306,284,254 
Gross unrealized appreciation  $ 14,725,584 
Gross unrealized depreciation  (5,936,399) 
Net unrealized appreciation  $ 8,789,185 

(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) When-issued security. Unsettled when-issued transactions were as
follows:

    Unrealized 
Counterparty  Value  Appreciation 
Merrill Lynch & Co.  $ 3,142,400   $ 15,739 

(d) Represents a zero-coupon bond. Rate shown reflects the current yield as
of report date.
(e) Issuer filed for bankruptcy and/or is in default of interest payments.
(f) Non-income producing security.
(g) 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.
(h) 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  3,181,516  9,527,498  12,709,014  $2,154 

(i) Represents the current yield as of report date.

4 BLACKROCK MUNIYIELD NEW JERSEY FUND, INC.

APRIL 30, 2010

Schedule of Investments (concluded)

BlackRock MuniYield New Jersey Fund, Inc. (MYJ)

• 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 summarize 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         
 Investments 1  —             $308,968,126           —   $ 308,968,126 
Short-Term         
 Securities  $ 12,709,014    —           —  12,709,014 
Total  $ 12,709,014        $308,968,126           —  $ 321,677,140 

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

BLACKROCK MUNIYIELD NEW JERSEY 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 MuniYield New Jersey Fund, Inc.

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

Date: June 28, 2010

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

Date: June 28, 2010