Warren County

Parcel & Property Data

48,558Total Parcels

—Avg. Market Value

223,934Total Acres (measured from parcel boundaries)

About This Data

LandBrief holds 48,558 parcel records for Warren County, sourced from county records. Each includes the parcel boundary, and — where the county publishes them — owner, situs address, acreage, assessed values and legal description.

Data from the Warren County assessor roll dated August 2017, loaded August 2026. See data sources for every county’s vintage.

Explore Warren County

Warren County by the Numbers

Median parcel size: 0.42 acres
measured from mapped boundaries
90th-percentile parcel: 7.1 acres
County land area: 228,186 acres
U.S. Census measurement
Communities: 44
15.9% of parcels outside any incorporated place

Who Owns Warren County?

Share of the county’s 48,558 parcels by the kind of owner on record. Classified from owner names, so the boundaries are approximate; an entity the rules cannot place counts as an individual.

Owner type	Share of parcels
Individuals	83.7%
Companies & organizations	6.6%
Trusts & estates	1.2%
Government	2.4%
Other / unclassified	6.1%

The largest owner on record is MANSFIELD TOWNSHIP with 206 parcels — see the full landowner leaderboard.

Parcel Records (~48,558 total)

Showper page

Parcel ID	Owner	Address	City	Acreage
2112_33_11	DEP STATE OF NEW JERSEY	N S SHADES OF DEATH Rd	Unincorporated	5.84 †
2101_902_102	STATE OF NJ DEPT ENVIR PRO	1119 1123 WATERLOO Rd	Unincorporated	8.24 †
2101_201_39	POLOWY STEPHEN	12 14 KASPER Rd	Unincorporated	3.01 †
2101_401_6.04_Q0039	FREEBORN LARRY AND CAROL	4 20 TRANQUILITY Ln	Allamuchy	138.34 †
2101_401_6.01	FREEBORN LARRY & CAROL	24 26 JOHNSONBURG Rd	Allamuchy	2.53 †
2101_401_14	HOWIE GUY ROGER	25 27	Allamuchy	0.61 †
2101_401_13	PESHKOPIA DEAN	2 4	Allamuchy	0.44 †
2101_701_1006	TOWNSHIP OF ALLAMUCHY	ADJ	Panther Valley	75.98 †
2101_701_1002	PVPOA	ADJOINS GOLF Crse	Panther Valley	84.36 †
2101_901_112	STATE OF NJ DEPT. ENVIR. PRO.	ADJ TO Rte	Unincorporated	10.68 †

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All 48,558 parcels in Warren County as a single file — free, no account needed. Shapefile, GeoJSON, GeoPackage, CSV and Parquet.

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Frequently Asked Questions

How many parcels are in Warren County?

The Warren County assessor roll on file records 48,558 parcels across 44 communities, with 15.9% lying outside any incorporated place.

Who owns the most land in Warren County?

MANSFIELD TOWNSHIP holds 206 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.

What is the typical parcel size in Warren County?

Measured from mapped boundaries, the median parcel is 0.42 acres, and nine parcels in ten are under 7.1 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.

How much of Warren County is government-owned?

Government entities — federal, state, and local — hold 2.4% of the county’s parcels, classified from owner names on the roll.

How current is this data?

It comes from the Warren County assessor roll dated August 2017. Counties deliver on their own schedules; the methodology page explains how records are processed and the data sources page tracks every county’s vintage.

Browse by City (44)

48,558 parcels across 44 communities in Warren County.