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Montgomery County, IL Parcels & GIS Data

Montgomery County, IL parcel data: 25,819 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Montgomery County, Illinois parcel data covering 25,819 property records.

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

Montgomery County is a county located in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 28,288. Its county seat is Hillsboro.

FIPS 17135

Official county website: https://montgomerycountyil.gov/county-clerk-recorder/

The FIPS code for Montgomery County is 17135.

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Attribute coverage

Montgomery County contains 25,819 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%25,819
parcelid100%25,819
parcelid2<0.1%0
ogparcelid100%25,819
ogparcelid299.9%25,795
parentid<0.1%0
stackid<0.1%0
geoid100%25,819
statefp100%25,819
countyfp100%25,819
countyname100%25,819
cousubfp100%25,819
cousubname100%25,819
tractce100%25,819
tractname100%25,819
taxacctnum<0.1%0
taxyear100%25,819
taxdistrict<0.1%0
usecode<0.1%0
usedesc<0.1%7
zoningcode<0.1%0
zoningdesc<0.1%0
numbldgs0.7%190
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
imprvalue<0.1%0
landvalue<0.1%0
agvalue<0.1%0
totalvalue<0.1%0
taxacres54.3%14,010
calcarea100%25,819
saleamt<0.1%0
saledate<0.1%0
ownertype99.5%25,702
ownername99.5%25,702
owneraddr<0.1%0
ownercity<0.1%0
ownerstate<0.1%0
ownerzip<0.1%0
parceladdr99.8%25,763
parcelcity0.6%146
parcelstate100%25,819
parcelzip100%25,819
legaldesc<0.1%0
township100%25,818
section100%25,818
qtrsection100%25,818
range100%25,818
plssdesc100%25,818
book<0.1%0
page<0.1%0
block<0.1%0
lot<0.1%0
parceltype0.1%33
accesstype0.3%68
iucnclass0.1%31
placename3.3%848
placetype3.2%821
firmid<0.1%0
firmdate<0.1%0
fldzone<0.1%0
zonesubty<0.1%0
staticbfe<0.1%0
elevmin97.7%25,237
elevmax97.7%25,237
elevavg97.7%25,237
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
naicscode13.5%3,480
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated75.8%19,568
centroidx100%25,819
centroidy100%25,819
surfpointx100%25,819
surfpointy100%25,819
geom100%25,819
extras100%25,819
ownerlist70.1%18,110
placefp36.2%9,355
zoningurl<0.1%0
lbcsactivity2.0%518
lbcsfunction2.0%510
lbcstype2.2%574
lbcscharacter2.5%637
lbcsownership99.6%25,703
sourceurl<0.1%0

Schema mapping

How source columns from the acquired Montgomery 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 — Montgomery County, Illinois (17135) 1 entity · most recent acquisition per entity · generated 2026-10-10 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 parcelid parcelid2 taxacres ownername parceladdr geom parentid 2 cols ⇢ parcelid parcelid2 taxacres ownername parceladdr geom parentid extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 100% taxyear 75.8% updated geom · derived from geometry geom dem.us_1m · USGS 1m DEM 97.7% elevmin 97.7% elevmax 97.7% elevavg supplemented · derived / other pipelines 100% parcelstate 100% parcelzip 100% township 100% section 100% qtrsection 100% range 100% plssdesc 70.1% ownerlist 100% lbcsownership lrid parcelid parcelid2 ogparcelid ogparcelid2 parentid geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxyear taxacres calcarea ownertype ownername parceladdr parcelstate parcelzip township section qtrsection range plssdesc elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras ownerlist lbcsownership publish.parcel_layer columns not fed by these sources (62) — empty or below 50% fill in this county stackid, taxacctnum, taxdistrict, usecode, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms halfbaths, fullbaths, imprvalue, landvalue, agvalue, totalvalue, saleamt, saledate, owneraddr, ownercity, ownerstate, ownerzip, parcelcity legaldesc, book, page, block, lot, parceltype, accesstype, iucnclass, placename, placetype, firmid, firmdate, fldzone, zonesubty, staticbfe fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit placefp, zoningurl, lbcsactivity, lbcsfunction, lbcstype, lbcscharacter, sourceurl PARCEL 7 mapped · 6 transformed · 2 kept in extras · 47 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL parcelid parcelid2 taxacres ownername parceladdr geom parentid parcelid NULLIF(TRIM(parcelid), '')::text parcelid2 NULLIF(TRIM(parcelid2), '')::text taxacres NULLIF(TRIM(taxacres), '')::text ownername NULLIF(TRIM(ownername), '')::text parceladdr NULLIF(TRIM(parceladdr), '')::text geom parentid NULLIF(TRIM(parentid), '')::text extras · 2 source columns preserved as json ogparcelid, geoid extras not present in source — filled with NULL (47) taxacctnum, taxyear, usecode, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths fullbaths, imprvalue, landvalue, agvalue, totalvalue, saleamt, saledate, owneraddr, ownercity, ownerstate, ownerzip, parcelcity, parcelstate parcelzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page, block, lot, updated, sourceurl, taxdistrict, heatfuel fireplaces, heating, cooling, foundation, roofcover, siding

Neighboring counties

Parcel data for counties bordering Montgomery County:

Frequently asked questions

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

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

How many parcels are in Montgomery County, IL?

The current dataset contains 25,819 parcel records for Montgomery County, IL, each with its boundary geometry and assessor attributes.

What is the FIPS code for Montgomery County, IL?

The FIPS code for Montgomery County, IL is 17135.

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

Each Montgomery 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 Montgomery County, IL parcel data free?

You can preview Montgomery 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.

Does Montgomery County, IL have an official GIS or property records website?

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

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated