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Adams County, IL Parcels & GIS Data

Adams County, IL parcel data: 38,784 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Adams County, Illinois parcel data covering 38,784 property records.

This page documents parcel-level coverage for Adams County, Illinois. 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 Adams County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Adams County property dataset.

Adams County is the westernmost county in the U.S. state of Illinois. As of the 2020 United States census, the population was 65,737. Its county seat is Quincy.

FIPS 17001

The FIPS code for Adams County is 17001.

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Attribute coverage

Adams County contains 38,784 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%38,784
parcelid100%38,784
parcelid2<0.1%0
ogparcelid100%38,784
ogparcelid2<0.1%0
parentid<0.1%0
stackid<0.1%0
geoid100%38,784
statefp100%38,784
countyfp100%38,784
countyname100%38,784
cousubfp100%38,784
cousubname100%38,784
tractce100%38,784
tractname100%38,784
taxacctnum<0.1%0
taxyear<0.1%0
taxdistrict99.6%38,640
usecode99.6%38,640
usedesc<0.1%0
zoningcode<0.1%0
zoningdesc<0.1%0
numbldgs<0.1%0
numunits<0.1%0
yearbuilt<0.1%0
numfloors<0.1%0
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue95.0%36,830
landvalue95.0%36,830
agvalue95.0%36,830
totalvalue95.0%36,830
taxacres99.6%38,640
calcarea100%38,784
saleamt<0.1%0
saledate<0.1%0
ownertype99.6%38,640
ownername99.6%38,640
owneraddr99.6%38,640
ownercity<0.1%0
ownerstate<0.1%0
ownerzip<0.1%0
parceladdr99.6%38,640
parcelcity<0.1%0
parcelstate100%38,784
parcelzip100%38,784
legaldesc99.6%38,640
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book<0.1%0
page<0.1%0
block<0.1%0
lot<0.1%0
parceltype0.3%130
accesstype0.3%130
iucnclass0.2%67
placename4.1%1,601
placetype4.1%1,574
firmid100%38,784
firmdate100%38,784
fldzone100%38,784
zonesubty96.9%37,601
staticbfe0.1%53
elevmin0.4%143
elevmax0.4%143
elevavg0.4%143
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
naicscode16.1%6,251
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated<0.1%0
centroidx100%38,784
centroidy100%38,784
surfpointx100%38,784
surfpointy100%38,784
geom100%38,784
extras100%38,784
ownerlist<0.1%0

Schema mapping

How source columns from the acquired Adams 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 — Adams County, Illinois (17001) 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 pin usecode taxdue acres ownername owneraddress siteaddress legaldesc township section range weblink geom taxcode 4 cols ⇢ parcelid usecode totalvalue taxacres ownername owneraddr parceladdr legaldesc township section range sourceurl geom taxdistrict extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname geom · derived from geometry geom dem.us_1m · USGS 1m DEM 0.4% elevmin 0.4% elevmax 0.4% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 96.9% zonesubty 0.1% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 95.0% imprvalue 95.0% landvalue 95.0% agvalue 100% parcelstate 100% parcelzip lrid parcelid ogparcelid geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxdistrict usecode imprvalue landvalue agvalue totalvalue taxacres calcarea ownertype ownername owneraddr parceladdr parcelstate parcelzip legaldesc township section range firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg centroidx centroidy surfpointx surfpointy geom extras publish.parcel_layer columns not fed by these sources (50) — empty or below 50% fill in this county parcelid2, ogparcelid2, parentid, stackid, taxacctnum, taxyear, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors bldgsqft, bedrooms, halfbaths, fullbaths, saleamt, saledate, ownercity, ownerstate, ownerzip, parcelcity, qtrsection, plssdesc, book, page block, lot, parceltype, accesstype, iucnclass, placename, placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit, updated, ownerlist PARCEL 14 mapped · 4 kept in extras · 40 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL pin usecode taxdue acres ownername owneraddress siteaddress legaldesc township section range weblink geom taxcode parcelid usecode totalvalue taxacres ownername owneraddr parceladdr legaldesc township section range sourceurl geom taxdistrict extras · 4 source columns preserved as json owneraddress2, ownercsz, trs, docnumber extras not present in source — filled with NULL (40) parcelid2, taxacctnum, taxyear, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths fullbaths, imprvalue, landvalue, agvalue, saleamt, saledate, ownercity, ownerstate, ownerzip, parcelcity, parcelstate, parcelzip, qtrsection plssdesc, book, page, block, lot, updated, parentid, fireplaces, heating, cooling, foundation, roofcover, siding, heatfuel

Neighboring counties

Parcel data for counties bordering Adams County:

Frequently asked questions

Where can I find Adams County, IL parcel and GIS data?

Land Records publishes a Adams County, IL 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 Adams County, IL dataset as a GeoPackage or CSV.

How many parcels are in Adams County, IL?

The current dataset contains 38,784 parcel records for Adams County, IL, each with its boundary geometry and assessor attributes.

What is the FIPS code for Adams County, IL?

The FIPS code for Adams County, IL is 17001.

What information does each Adams County, IL parcel record include?

Each Adams County, IL 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 Adams County, IL parcel data free?

You can preview Adams County, IL 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