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Mercer County, NJ Parcels & GIS Data

Mercer County, NJ parcel data: 142,346 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 142,346 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

Official county website: https://njogis-newjersey.opendata.arcgis.com/documents/d99b8d35f7a64621b8d776d0074e06b6

The FIPS code for Mercer County is 34021.

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Attribute coverage

Mercer County contains 142,346 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL). For the LBCS columns, only real classifications count: the to-be-determined and not-applicable placeholder codes are excluded.

ColumnCoverageRecords populated
lrid100%142,346
parcelid100%142,346
parcelid2100%142,345
ogparcelid100%142,346
ogparcelid2100%142,345
parentid<0.1%0
stackid<0.1%0
geoid100%142,346
statefp100%142,346
countyfp100%142,346
countyname100%142,346
cousubfp100%142,346
cousubname100%142,346
tractce100%142,346
tractname100%142,346
taxacctnum11.0%15,646
taxyear100%142,346
taxdistrict<0.1%0
usecode95.3%135,588
usedesc73.6%104,747
zoningcode62.2%88,586
zoningdesc11.3%16,036
numbldgs49.8%70,866
numunits42.7%60,762
yearbuilt64.5%91,879
numfloors58.9%83,883
bldgsqft61.9%88,139
bedrooms58.7%83,611
halfbaths31.3%44,558
fullbaths59.1%84,078
imprvalue10.1%14,334
landvalue11.1%15,832
agvalue<0.1%3
totalvalue35.9%51,063
taxacres<0.1%0
calcarea100%142,346
saleamt39.4%56,146
saledate45.6%64,899
ownertype73.5%104,593
ownername11.2%15,891
owneraddr49.5%70,453
ownercity49.5%70,480
ownerstate49.5%70,417
ownerzip49.5%70,444
parceladdr94.7%134,784
parcelcity94.3%134,278
parcelstate100%142,346
parcelzip100%142,346
legaldesc<0.1%3
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book44.2%62,888
page44.2%62,875
block100%142,346
lot100%142,346
parceltype1.5%2,159
accesstype1.5%2,159
iucnclass0.7%959
placename5.4%7,628
placetype5.3%7,501
firmid100%142,346
firmdate100%142,346
fldzone100%142,346
zonesubty97.7%139,081
staticbfe<0.1%2
elevmin99.9%142,219
elevmax99.9%142,219
elevavg99.9%142,219
fireplaces<0.1%1
heating76.4%108,693
heatfuel76.0%108,126
cooling76.4%108,741
foundation52.1%74,139
roofcover53.7%76,395
siding49.4%70,283
bldgtype<0.1%0
naicscode4.6%6,551
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated95.6%136,075
centroidx100%142,346
centroidy100%142,346
surfpointx100%142,346
surfpointy100%142,346
geom100%142,346
extras100%142,346
ownerlist11.2%15,877
placefp49.4%70,370
zoningurl23.8%33,812
lbcsactivity91.6%130,340
lbcsfunction88.5%125,975
lbcstype91.7%130,475
lbcscharacter91.8%130,680
lbcsownership15.3%21,712
sourceurl73.5%104,590

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) 3 entities · most recent acquisition per entity · generated 2026-10-17 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 ADDRESS building place_type landmkname add_number primename unit floor post_code nbrhd_comm uninc_comm post_comm county state country geom 47 cols ⇢ house category near house_number road unit level postcode suburb city_district city state_district state country geom extras PARCEL pams_pin pin_nodup prop_class prop_loc mun_name pclblock pcllot pcllastupd geom 7 cols ⇢ parcelid parcelid2 usecode parceladdr parcelcity block lot updated geom extras ZONING property_zoning geom id propid blockno lotno qualcode property_class property_location property_buildingdescription property_landdimension custom_acreage_2decimals exempt_facilityname property_buildingdescription_1 number_buildingsf property_constructionyear street_name street_number property_zoning_1 design roofmaterial rooftype storyhgt typeuse yearbuilt exteriorfinish_1 exteriorfinish_2 exteriorfinish_3 exteriornc attachment_url attachment_url_1 attachment_url_2 attachment_url_3 attachment_url_4 attachment_url_5 attachment_url_6 attachment_url_7 attachment_url_8 attachment_url_9 attachment_url_10 attachment_url_11 attachment_url_12 attachment_url_13 attachment_url_14 attachment_url_15 attachment_url_16 attachment_url_17 attachment_url_18 attachment_url_19 attachment_url_20 attachment_url_21 attachment_url_22 attachment_url_23 attachment_url_24 attachment_url_25 attachment_url_26 attachment_url_27 attachment_url_28 attachment_url_29 attachment_url_30 attachment_url_31 attachment_url_32 attachment_url_33 attachment_url_34 attachment_url_35 attachment_url_36 zoningcode geom extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 100% 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 73.6% usedesc 64.5% yearbuilt 58.9% numfloors 61.9% bldgsqft 58.7% bedrooms 59.1% fullbaths 73.5% ownertype 100% parcelstate 100% parcelzip 76.4% heating 76.0% heatfuel 76.4% cooling 52.1% foundation 53.7% roofcover 91.6% lbcsactivity 88.5% lbcsfunction 91.7% lbcstype 91.8% lbcscharacter 73.5% sourceurl lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxyear usecode usedesc zoningcode yearbuilt numfloors bldgsqft bedrooms fullbaths calcarea ownertype parceladdr parcelcity parcelstate parcelzip block lot firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg heating heatfuel cooling foundation roofcover updated centroidx centroidy surfpointx surfpointy geom extras lbcsactivity lbcsfunction lbcstype lbcscharacter sourceurl publish.parcel_layer columns not fed by these sources (46) — empty or below 50% fill in this county parentid, stackid, taxacctnum, taxdistrict, zoningdesc, numbldgs, numunits, halfbaths, imprvalue, landvalue, agvalue, totalvalue, taxacres saleamt, saledate, ownername, owneraddr, ownercity, ownerstate, ownerzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page parceltype, accesstype, iucnclass, placename, placetype, fireplaces, siding, bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit rcrapermit, ownerlist, placefp, zoningurl, lbcsownership ADDRESS 15 mapped · 47 kept in extras · 6 unmapped (NULL) SOURCE COLUMNS HARMONIZED → ADDRESS building place_type landmkname add_number primename unit floor post_code nbrhd_comm uninc_comm post_comm county state country geom house category near house_number road unit level postcode suburb city_district city state_district state country geom extras · 47 source columns preserved as json subtype, primarypt, status, discrpagid, source, dateupdate editor, effective, expire, site_nguid, adddatauri, inc_muni addnum_pre, addnum_suf, st_premod, st_predir, st_pretyp st_presep, st_name, st_postyp, st_posdir, st_posmod, fulladdr lst_predir, lst_name, lst_type, lstposdir, lst_pname, esn msagcomm, post_code4, post_source, cass_valid, room, seat addtl_loc, fullsubadd, mile_post, placement, long_, lat, elev natgrid_coord, rcl_nguid, pcl_guid, comments, globalid extras not present in source — filled with NULL (6) staircase, entrance, po_box, island, country_region, world_region PARCEL 9 mapped · 1 transformed · 7 kept in extras · 45 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL pams_pin pin_nodup prop_class prop_loc mun_name pclblock pcllot pcllastupd geom parcelid parcelid2 usecode parceladdr parcelcity block lot updated to_timestamp(pcllastupd / 1000.0)::text geom extras · 7 source columns preserved as json pcl_pbdate, pcl_mun, pclqcode, gis_pin, cd_code, county pcl_guid extras not present in source — filled with NULL (45) 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, parcelstate parcelzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page, sourceurl, taxdistrict, parentid, heatfuel, fireplaces heating, cooling, foundation, roofcover, siding ZONING 3 mapped · 2 transformed · 7 unmapped (NULL) SOURCE COLUMNS HARMONIZED → ZONING property_zoning geom id propid blockno lotno qualcode property_class property_location property_buildingdescription property_landdimension custom_acreage_2decimals exempt_facilityname property_buildingdescription_1 number_buildingsf property_constructionyear street_name street_number property_zoning_1 design roofmaterial rooftype storyhgt typeuse yearbuilt exteriorfinish_1 exteriorfinish_2 exteriorfinish_3 exteriornc attachment_url attachment_url_1 attachment_url_2 attachment_url_3 attachment_url_4 attachment_url_5 attachment_url_6 attachment_url_7 attachment_url_8 attachment_url_9 attachment_url_10 attachment_url_11 attachment_url_12 attachment_url_13 attachment_url_14 attachment_url_15 attachment_url_16 attachment_url_17 attachment_url_18 attachment_url_19 attachment_url_20 attachment_url_21 attachment_url_22 attachment_url_23 attachment_url_24 attachment_url_25 attachment_url_26 attachment_url_27 attachment_url_28 attachment_url_29 attachment_url_30 attachment_url_31 attachment_url_32 attachment_url_33 attachment_url_34 attachment_url_35 attachment_url_36 zoningcode NULLIF(TRIM(property_zoning), '')::text geom extras ( json_build_object( 'id', id::text, 'propid', propid::text, 'b… not present in source — filled with NULL (7) zoningdesc, zoningtype, ordinance, setbacks, restrictions, notes, sourceurl

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 142,346 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.

Does Mercer County, NJ have an official GIS or property records website?

Yes — the official Mercer County, NJ government website is linked in the county details above. Land Records standardizes Mercer County, NJ assessor and recorder records into a single nationwide parcel schema with GIS boundary geometry.

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated