N-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-07670

Name of Fund: BlackRock New Jersey Investment Quality Municipal Trust, Inc. (RNJ)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Anne F. Ackerley, Chief Executive Officer, BlackRock New Jersey Investment Quality Municipal Trust, Inc., 55 East 52^nd 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: 10/31/2009

Item 1 – Schedule of Investments

BlackRock New Jersey Investment Quality Municipal Trust, Inc. (RNJ)
Schedule of Investments October 31, 2009 (Unaudited)	(Percentages shown are based on Net Assets)

	Municipal Bonds	Par (000)		Value
New Jersey - 136.0%
Corporate - 11.3%	New Jersey EDA, RB, Continental Airlines Inc. Project, AMT, 7.00%, 11/15/30	$	925	$	858,918
	New Jersey EDA, RB, Disposal, Waste Management New Jersey, Series A, AMT, 5.30%, 6/01/15		500		522,710
					1,381,628
County/City/Special District/School District - 9.9%	City of Perth Amboy New Jersey, GO, CAB (FSA), 4.97%, 7/01/34 (a)		100		88,201
	Cumberland County Improvement Authority, RB, Series A, 5.00%, 1/01/30		75		72,498
	Essex County Improvement Authority, Refunding RB, County Guaranteed, Project Consolidation (MBIA), 5.50%, 10/01/29		260		289,936
	Hudson County Improvement Authority, RB, CAB, County Guaranteed, Series A-1 (MBIA), 4.50%, 12/15/32 (b)		1,000		261,400
	Hudson County Improvement Authority, RB, County Guaranteed, Harrison Parking Facilities Project, Series C (AGC), 5.38%, 1/01/44		340		358,727
	Middlesex County Improvement Authority, RB, Subordinate, Heldrich Center Hotel, Series B, 6.25%, 1/01/37		200		36,792
	Salem County Improvement Authority, RB, Finlaw State Office Building (FSA), 5.25%, 8/15/38		100		104,076
					1,211,630
Education - 12.3%	New Jersey EDA, Refunding RB, School Facilities Construction, Series AA, 5.50%, 12/15/29		200		215,798
	New Jersey Educational Facilities Authority, RB, Montclair State University, Series J, 5.25%, 7/01/38		100		101,875
	New Jersey Educational Facilities Authority, Refunding RB, College of New Jersey, Series D (FSA), 5.00%, 7/01/35		380		390,469
	New Jersey Educational Facilities Authority, Refunding RB, Ramapo College, Series I (AMBAC), 4.25%, 7/01/31		250		228,783
	New Jersey Educational Facilities Authority, Refunding RB, Rowan University, Series B (AGC), 5.00%, 7/01/24		255		274,673

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.
AMBAC	American Municipal Bond Assurance Corp.
AMT	Alternative Minimum Tax (subject to)
CAB	Capital Appreciation Bonds
COP	Certificates of Participation
EDA	Economic Development Authority
FSA	Financial Security Assurance Inc.
GO	General Obligation Bonds
HFA	Housing Finance Agency
MBIA	Municipal Bond Investors Assurance (National Public Finance Guaranty Corp.)
RB	Revenue Bonds
S/F	Single-Family

1

BlackRock New Jersey Investment Quality Municipal Trust, Inc. (RNJ)
Schedule of Investments October 31, 2009 (Unaudited)	(Percentages shown are based on Net Assets)

	Municipal Bonds	Par (000)		Value
	New Jersey Educational Facilities Authority, Refunding RB, Series D, Georgian Court University, 5.00%, 7/01/33	$	100	$	92,547
	New Jersey Educational Facilities Authority, Refunding RB, University Medical & Dentistry, Series B, 7.50%, 12/01/32		175		197,041
					1,501,186
Health - 23.4%	Burlington County Bridge Commission, RB, The Evergreens Project, 5.63%, 1/01/38		150		123,188
	New Jersey EDA, RB, First Mortgage, Lions Gate Project, Series A, 5.75%, 1/01/25		60		51,695
	New Jersey EDA, RB, First Mortgage, Lions Gate Project, Series A, 5.88%, 1/01/37		110		85,878
	New Jersey EDA, Refunding RB, First Mortgage, Winchester, Series A, 5.80%, 11/01/31		500		486,680
	New Jersey EDA, Refunding RB, Seabrook Village Inc. Facilities, 5.25%, 11/15/26		140		115,346
	New Jersey Health Care Facilities Financing Authority, RB, CAB, Saint Barnabas Health, Series B, 5.90%, 7/01/30 (b)		500		94,590
	New Jersey Health Care Facilities Financing Authority, RB, CAB, Saint Barnabas Health, Series B, 5.69%, 7/01/36 (b)		840		94,072
	New Jersey Health Care Facilities Financing Authority, RB, CAB, Saint Barnabas Health, Series B, 5.76%, 7/01/37 (b)		900		92,601
	New Jersey Health Care Facilities Financing Authority, RB, Hackensack University Medical Center, 6.00%, 1/01/25		1,000		1,008,310
	New Jersey Health Care Facilities Financing Authority, RB, Hospital Asset Transformation Program, Series A, 5.25%, 10/01/38		250		253,365
	New Jersey Health Care Facilities Financing Authority, RB, Meridian Health, Series I (AGC), 5.00%, 7/01/38		100		98,941
	New Jersey Health Care Facilities Financing Authority, RB, Saint Barnabas Health Care System, Series A, 5.00%, 7/01/29		250		197,453
	New Jersey Health Care Facilities Financing Authority, RB, Virtua Health (AGC), 5.50%, 7/01/38		150		154,871
					2,856,990
Housing - 12.7%	New Jersey State Housing & Mortgage Finance Agency, RB, Series A, 4.75%, 11/01/29		140		137,868
	New Jersey State Housing & Mortgage Finance Agency, RB, Series AA, 6.38%, 10/01/28		245		270,382
	New Jersey State Housing & Mortgage Finance Agency, RB, Series AA, 6.50%, 10/01/38		185		200,880
	New Jersey State Housing & Mortgage Finance Agency, RB, S/F Housing, Series CC, 5.00%, 10/01/34		210		208,511
	New Jersey State Housing & Mortgage Finance Agency, RB, S/F Housing, Series X, AMT, 4.85%, 4/01/16		500		512,255
	Newark Housing Authority, RB, South Ward Police Facility (AGC), 6.75%, 12/01/38		200		224,082
					1,553,978

2

BlackRock New Jersey Investment Quality Municipal Trust, Inc. (RNJ)
Schedule of Investments October 31, 2009 (Unaudited)	(Percentages shown are based on Net Assets)

	Municipal Bonds	Par (000)		Value
State - 26.3%	New Jersey EDA, RB, Cigarette Tax (Radian), 5.75%, 6/15/34	$	1,000	$	950,730
	New Jersey EDA, RB, Newark Downtown District Management Corp., 5.13%, 6/15/37		100		82,563
	New Jersey EDA, RB, School Facilities Construction, Series Z (AGC), 5.50%, 12/15/34		500		538,800
	New Jersey EDA, RB, School Facilities Construction, Series Z (AGC), 6.00%, 12/15/34		300		335,139
	New Jersey EDA, RB, Transportation Project Sublease, Series A (FSA), 5.75%, 5/01/10		900		923,328
	New Jersey Transportation Trust Fund Authority, New Jersey, RB, Transportation System, Series A, 6.00%, 12/15/38		150		163,977
	New Jersey Transportation Trust Fund Authority, New Jersey, RB, Transportation System, Series A (AGC), 5.63%, 12/15/28		100		111,992
	State of New Jersey, COP, Equipment Lease Purchase, Series A, 5.25%, 6/15/28		100		103,430
					3,209,959
Tobacco - 1.1%	Tobacco Settlement Financing Corp., New Jersey, RB, Series 1A, 4.50%, 6/01/23		150		134,310
Transportation - 27.6%	Delaware River Port Authority Pennsylvania & New Jersey, RB (FSA), 5.75%, 1/01/26		1,000		1,002,080
	New Jersey State Turnpike Authority, RB, Series C (AMBAC), 6.50%, 1/01/16 (c)		785		908,292
	New Jersey State Turnpike Authority, RB, Series C-2005 (AMBAC), 6.50%, 1/01/16 (c)		55		67,609
	New Jersey State Turnpike Authority, RB, Series C-2005 (AMBAC), 6.50%, 1/01/16		160		189,142
	New Jersey State Turnpike Authority, RB, Series E, 5.25%, 1/01/40		300		313,521
	New Jersey Transportation Trust Fund Authority, New Jersey, RB, Transportation System, Series A, 5.88%, 12/15/38		175		189,296
	Port Authority of New York & New Jersey, RB, Consolidated, 152nd Series, AMT, 5.75%, 11/01/30		250		265,705
	South Jersey Transportation Authority, RB, Series A (MBIA), 4.50%, 11/01/35		490		444,768
					3,380,413
Utilities - 10.0%	New Jersey EDA, RB, Series A, New Jersey, American Water, AMT (AMBAC), 5.25%, 11/01/32		225		212,663
	Passaic Valley Sewage Commissioners, GO, Sewer System, Series E (AMBAC), 5.75%, 12/01/21		1,000		1,013,060
					1,225,723
Utilities: Water & Sewer - 1.4%	New Jersey EDA, Refunding RB, New Jersey American Water Co., Series A, AMT, 5.70%, 10/01/39		175		171,133
	Total Municipal Bonds in New Jersey				16,626,950

3

BlackRock New Jersey Investment Quality Municipal Trust, Inc. (RNJ)
Schedule of Investments October 31, 2009 (Unaudited)	(Percentages shown are based on Net Assets)

	Municipal Bonds	Par (000)		Value
Puerto Rico - 15.2%
Education - 4.1%	Puerto Rico Industrial Tourist Educational Medical & Environmental Control Facilities Financing Authority, RB, Ana G. Mendez University System Project, 5.00%, 3/01/26	$	600	$	501,678
GO: Other - 3.1%	Puerto Rico Sales Tax Financing Corp., RB, First Sub-Series A, 5.75%, 8/01/37		365		377,629
Housing - 2.4%	Puerto Rico HFA, RB, Subordinate, Capital Fund Modernization, 5.13%, 12/01/27		300		299,460
State - 2.7%	Puerto Rico Infrastructure Financing Authority, RB, CAB, Series A (AMBAC), 4.36%, 7/01/37 (b)		795		107,261
	Puerto Rico Public Buildings Authority, Refunding RB, Government Facilities, Series M-3 (MBIA), 6.00%, 7/01/27		215		221,568
					328,829
Utilities: Electric & Gas - 2.9%	Puerto Rico Electric Power Authority, RB, Series WW, 5.50%, 7/01/38		350		351,169
	Total Municipal Bonds in Puerto Rico				1,858,765
	Total Municipal Bonds - 151.2%				18,485,715
	Municipal Bonds Transferred to Tender Option Bond Trusts (d)
New Jersey - 2.0%
Transportation - 2.0%	Port Authority of New York & New Jersey, Refunding RB, Consolidated 152nd Series, AMT, 5.25%, 11/01/35		245		244,530
	Total Municipal Bonds Transferred to Tender Option Bond Trusts - 2.0%				244,530
	Total Long-Term Investments (Cost - $19,293,600) - 153.2%				18,730,245
	Short-Term Securities	Shares
	CMA New Jersey Municipal Money Fund, 0.04% (e)(f)		419,712		419,712
	Total Short-Term Securities (Cost - $419,712) - 3.4%				419,712
	Total Investments (Cost - $19,713,312*) - 156.6%				19,149,957
	Other Assets Less Liabilities - 1.1%				140,471
	Liability for Trust Certificates, Including Interest Expense and Fees Payable - (1.3)%				(160,206	)
	Preferred Shares, at Redemption Value - (56.4)%				(6,900,403	)
	Net Assets Applicable to Common Shares - 100.0%			$	12,229,819

* The cost and unrealized appreciation (depreciation) of investments as of October 31, 2009, as computed for federal income tax purposes, were as follows:

Aggregate cost	$	19,471,560
Gross unrealized appreciation	$	670,413
Gross unrealized depreciation		(1,151,933	)
Net unrealized depreciation	$	(481,520	)

4

BlackRock New Jersey Investment Quality Municipal Trust, Inc. (RNJ)

Schedule of Investments October 31, 2009 (Unaudited)

(a)	Represents a step-up bond that pays an initial coupon rate for the first period and then a higher coupon rate for the following periods. Rate shown is as of report date.
(b)	Represents a zero-coupon bond. Rate shown reflects the current yield as of report date.
(c)	Security is collateralized by Municipal or US Treasury Obligations.
(d)	Securities represent bonds transferred to a tender option bond trust in exchange for which the Trust acquired residual interest certificates. These securities serve as collateral in a financing transaction.
(e)	Represents the current yield as of report date.
(f)	Investments in companies considered to be an affiliate of the Trust, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

Affiliate	Net Activity			Income
CMA New Jersey Municipal Bond	$	(399,977	)	$	76

5

BlackRock New Jersey Investment Quality Municipal Trust, Inc. (RNJ)

Schedule of Investments October 31, 2009 (Unaudited)

•	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 Trust’s own assumptions used in determining the fair value of investments)
	The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. For information about the Trust’s policy regarding valuation of investments and other significant accounting policies, please refer to the Trust’s most recent financial statements as contained in its annual report.
	The following table summarizes the inputs used as of October 31, 2009 in determining the fair valuation of the Trust’s investments:

Valuation Inputs	Investments in Securities
	Assets
Level 1 - Short-Term Securities	$	419,712
Level 2 - Long-Term Investments1		18,730,245
Level 3		—
Total	$	19,149,957

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

6

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 New Jersey Investment Quality Municipal Trust, Inc.
By:	/s/ Anne F. Ackerley
	Anne F. Ackerley
	Chief Executive Officer of
	BlackRock New Jersey Investment Quality Municipal Trust, Inc.
Date: December 18, 2009
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 New Jersey Investment Quality Municipal Trust, Inc.
Date: December 18, 2009
By:	/s/ Neal J. Andrews
	Neal J. Andrews
	Chief Financial Officer (principal financial officer) of
	BlackRock New Jersey Investment Quality Municipal Trust, Inc.
Date: December 18, 2009

EX-99.CERT

EX-99. CERT

CERTIFICATION PURSUANT TO RULE 30a-2(a) UNDER THE 1940 ACT AND SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Anne F. Ackerley, Chief Executive Officer (principal executive officer) of BlackRock New Jersey Investment Quality Municipal Trust, Inc., certify that:
1.         I have reviewed this report on Form N-Q of BlackRock New Jersey Investment Quality Municipal Trust, Inc.;
2.         Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.         Based on my knowledge, the schedules of investments included in this report fairly present in all material respects the investments of the registrant as of the end of the fiscal quarter for which the report is filed;
4.         The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:
	a)          designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
	b)          designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
	c)          evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report, based on such evaluation; and
	d)          disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.         The registrant’s other certifying officer(s) and I have disclosed to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
	a)          all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and
	b)          any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: December 18, 2009

/s/ Anne F. Ackerley

Anne F. Ackerley

Chief Executive Officer (principal executive officer) of
BlackRock New Jersey Investment Quality Municipal Trust, Inc.

EX-99. CERT

CERTIFICATION PURSUANT TO RULE 30a-2(a) UNDER THE 1940 ACT AND SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Neal J. Andrews, Chief Financial Officer (principal financial officer) of BlackRock New Jersey Investment Quality Municipal Trust, Inc., certify that:
1.         I have reviewed this report on Form N-Q of BlackRock New Jersey Investment Quality Municipal Trust, Inc.;
2.         Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.         Based on my knowledge, the schedules of investments included in this report fairly present in all material respects the investments of the registrant as of the end of the fiscal quarter for which the report is filed;
4.         The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:
	a)          designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
	b)          designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
	c)          evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report, based on such evaluation; and
	d)          disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.         The registrant’s other certifying officer(s) and I have disclosed to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
	a)          all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and
	b)          any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: December 18, 2009

/s/ Neal J. Andrews

Neal J. Andrews

Chief Financial Officer (principal financial officer) of
BlackRock New Jersey Investment Quality Municipal Trust, Inc.