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Mercer County, NJ Parcels & GIS Data

Mercer County, NJ parcel data: 142,351 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Mercer County, New Jersey parcel data covering 142,351 property records.

This page documents parcel-level coverage for Mercer County, New Jersey. Each parcel record carries its boundary polygon (GIS geometry) along with attributes such as the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and most recent sale price and date. Exact fill rates for Mercer County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Mercer County property dataset.

Mercer County is a county located in the U.S. state of New Jersey. Its county seat is Trenton, also the state capital, prompting its nickname The Capital County. Mercer County alone constitutes the Trenton–Princeton metropolitan statistical area and is considered part of the New York combined statistical area by the U.S.

FIPS 34021

The FIPS code for Mercer County is 34021.

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Attribute coverage

Mercer County contains 142,351 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%142,351
parcelid100%142,351
parcelid2<0.1%3
ogparcelid100%142,351
ogparcelid2<0.1%3
parentid<0.1%0
stackid<0.1%0
geoid100%142,351
statefp100%142,351
countyfp100%142,351
countyname100%142,351
cousubfp100%142,351
cousubname100%142,351
tractce100%142,351
tractname100%142,351
taxacctnum<0.1%0
taxyear<0.1%3
taxdistrict<0.1%0
usecode100%142,350
usedesc<0.1%2
zoningcode<0.1%0
zoningdesc<0.1%0
numbldgs83.3%118,565
numunits<0.1%3
yearbuilt<0.1%3
numfloors<0.1%1
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue<0.1%3
landvalue<0.1%3
agvalue<0.1%3
totalvalue<0.1%3
taxacres<0.1%0
calcarea100%142,351
saleamt<0.1%3
saledate<0.1%1
ownertype<0.1%3
ownername<0.1%3
owneraddr<0.1%3
ownercity<0.1%0
ownerstate<0.1%0
ownerzip<0.1%0
parceladdr99.7%141,947
parcelcity99.1%141,064
parcelstate100%142,351
parcelzip100%142,351
legaldesc<0.1%3
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book<0.1%1
page<0.1%1
block100%142,351
lot100%142,351
parceltype1.5%2,103
accesstype1.5%2,103
iucnclass0.6%910
placename5.2%7,450
placetype5.1%7,323
firmid100%142,351
firmdate100%142,351
fldzone100%142,351
zonesubty97.7%139,080
staticbfe<0.1%2
elevmin99.9%142,224
elevmax99.9%142,224
elevavg99.9%142,224
fireplaces<0.1%0
heating<0.1%0
heatfuel<0.1%0
cooling<0.1%0
foundation<0.1%0
roofcover<0.1%0
siding<0.1%0
bldgtype<0.1%0
naicscode5.2%7,450
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated46.2%65,824
centroidx100%142,351
centroidy100%142,351
surfpointx100%142,351
surfpointy100%142,351
geom100%142,351
extras100%142,351
ownerlist<0.1%0

Schema mapping

How source columns from the acquired Mercer County GIS layers map into the harmonized entity schemas and assemble into the published parcel table, alongside supplemented fields (elevation, flood zone) and deterministic columns.

Schema mapping — Mercer County, New Jersey (34021) 1 entity · most recent acquisition per entity · generated 2026-07-25 direct column transformed (expression) geometry extras json supplemented determined ALL ENTITIES → FINAL PARCEL SCHEMA Harmonized entity columns assemble into publish.parcel_layer — matched by column name. Supplemented fields show their fill rate in this county. SOURCE COLUMNS HARMONIZED ENTITIES PUBLISH.PARCEL_LAYER PARCEL pams_pin qcode block lot lastupdate geom 2 cols ⇢ parcelid usecode block lot updated geom extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 0.0% taxyear geom · derived from geometry geom dem.us_1m · USGS 1m DEM 100% elevmin 100% elevmax 100% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 97.7% zonesubty 0.0% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 83.3% numbldgs 100% parceladdr 99.1% parcelcity 100% parcelstate 100% parcelzip lrid parcelid ogparcelid geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxyear usecode numbldgs calcarea parceladdr parcelcity parcelstate parcelzip block lot firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras publish.parcel_layer columns not fed by these sources (57) — empty or below 50% fill in this county parcelid2, ogparcelid2, parentid, stackid, taxacctnum, taxdistrict, usedesc, zoningcode, zoningdesc, numunits, yearbuilt, numfloors, bldgsqft bedrooms, halfbaths, fullbaths, imprvalue, landvalue, agvalue, totalvalue, taxacres, saleamt, saledate, ownertype, ownername, owneraddr ownercity, ownerstate, ownerzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page, parceltype, accesstype, iucnclass placename, placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype, naicscode, frsid, dfrurl, caapermit cwapermit, rcrapermit, ownerlist PARCEL 6 mapped · 2 kept in extras · 48 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL pams_pin qcode block lot lastupdate geom parcelid usecode block lot updated geom extras · 2 source columns preserved as json id, mun extras not present in source — filled with NULL (48) parcelid2, taxacctnum, taxyear, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths fullbaths, imprvalue, landvalue, agvalue, totalvalue, taxacres, saleamt, saledate, ownername, owneraddr, ownercity, ownerstate, ownerzip parceladdr, parcelcity, parcelstate, parcelzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page, sourceurl, taxdistrict parentid, fireplaces, heating, cooling, foundation, roofcover, siding, heatfuel

Neighboring counties

Parcel data for counties bordering Mercer County:

Frequently asked questions

Where can I find Mercer County, NJ parcel and GIS data?

Land Records publishes a Mercer County, NJ parcel dataset in which every parcel carries its boundary polygon (GIS geometry) along with ownership, assessed value, land use, acreage, and sale history. Preview it in the interactive explorer on this page, or download the full Mercer County, NJ dataset as a GeoPackage or CSV.

How many parcels are in Mercer County, NJ?

The current dataset contains 142,351 parcel records for Mercer County, NJ, each with its boundary geometry and assessor attributes.

What is the FIPS code for Mercer County, NJ?

The FIPS code for Mercer County, NJ is 34021.

What information does each Mercer County, NJ parcel record include?

Each Mercer County, NJ parcel record includes the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and the most recent sale price and date — plus the parcel boundary polygon. Per-attribute fill rates are listed in the coverage table on this page.

Is Mercer County, NJ parcel data free?

You can preview Mercer County, NJ parcels for free in the interactive explorer. The complete dataset is available as a one-time download or through the nationwide parcel web service; see the download options on this page for current pricing.

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated