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Mason County, IL Parcels & GIS Data

Mason County, IL parcel data: 16,655 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Mason County, Illinois parcel data covering 16,655 property records.

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

Mason County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 13,086. Its county seat is Havana.

FIPS 17125

Official county website: https://www.masoncountyil.gov

The FIPS code for Mason County is 17125.

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Attribute coverage

Mason County contains 16,655 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%16,655
parcelid99.9%16,646
parcelid299.9%16,646
ogparcelid99.9%16,645
ogparcelid299.9%16,646
parentid<0.1%0
stackid<0.1%0
geoid100%16,655
statefp100%16,655
countyfp100%16,655
countyname100%16,655
cousubfp100%16,655
cousubname100%16,655
tractce100%16,655
tractname100%16,655
taxacctnum<0.1%0
taxyear100%16,655
taxdistrict<0.1%0
usecode98.2%16,359
usedesc13.2%2,206
zoningcode<0.1%0
zoningdesc<0.1%0
numbldgs36.0%6,003
numunits30.4%5,057
yearbuilt<0.1%0
numfloors28.4%4,735
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
taxacres97.6%16,253
calcarea100%16,655
saleamt<0.1%0
saledate<0.1%0
ownertype98.1%16,345
ownername98.1%16,345
owneraddr97.4%16,222
ownercity0.5%88
ownerstate0.5%88
ownerzip0.5%88
parceladdr49.1%8,185
parcelcity0.8%130
parcelstate100%16,655
parcelzip100%16,655
legaldesc98.1%16,343
township100%16,654
section100%16,654
qtrsection100%16,654
range100%16,654
plssdesc100%16,654
book<0.1%0
page<0.1%0
block<0.1%0
lot<0.1%0
parceltype1.3%211
accesstype2.4%403
iucnclass2.0%327
placename38.8%6,460
placetype4.5%745
firmid100%16,655
firmdate100%16,655
fldzone100%16,655
zonesubty93.3%15,542
staticbfe1.2%200
elevmin96.5%16,072
elevmax96.5%16,072
elevavg96.5%16,072
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
naicscode47.5%7,905
frsid<0.1%4
dfrurl<0.1%4
caapermit<0.1%4
cwapermit<0.1%4
rcrapermit<0.1%4
updated76.7%12,775
centroidx100%16,655
centroidy100%16,655
surfpointx100%16,655
surfpointy100%16,655
geom100%16,655
extras100%16,655
ownerlist74.8%12,464
placefp36.4%6,065
zoningurl<0.1%0

Schema mapping

How source columns from the acquired Mason 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 — Mason County, Illinois (17125) 1 entity · most recent acquisition per entity · generated 2026-08-30 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 parcel_number pin alternate_parcel_number taxparcelnumberalt taxparcelnumber class taxpropertyclass taxzoning taxfarmbuilding taxnonfarmbuilding taxnonfarmland taxfarmland taxassessedlast gross_acreage taxgrossacres sale_date owner1_name owner2_name owner1_address owner2_address taxownercity taxownerstate taxownerzip site_address taxsiteaddress taxparcelcity taxparcelstate taxparcelzip legal_description taxlegaldescription township taxblock taxlot date_added sourceurl geom taxtownshipname mailto_address homesite_acreage farm_acreage taxtaxcode taxtownship taxsitecsz taxhomesiteacres taxfarmacres taxstatus taxlotdimension taxdocumentno1 taxowner1name taxowner1address1 taxowner1address2 taxowner1csz taxdocumentno2 taxowner2name taxowner2address1 taxowner2address2 taxowner2csz taxdateofsale taxmailtoname taxmailtoaddress1 taxmailtoaddress2 parcelid parcelid2 taxacctnum usecode zoningcode imprvalue landvalue agvalue totalvalue taxacres saledate ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip legaldesc township block lot updated 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 100% taxyear geom · derived from geometry geom dem.us_1m · USGS 1m DEM 96.5% elevmin 96.5% elevmax 96.5% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 93.3% zonesubty 1.2% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 100% section 100% qtrsection 100% range 100% plssdesc 74.8% ownerlist lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode zoningcode imprvalue landvalue agvalue totalvalue taxacres calcarea saledate ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip legaldesc township section qtrsection range plssdesc block lot firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras ownerlist publish.parcel_layer columns not fed by these sources (36) — empty or below 50% fill in this county parentid, stackid, usedesc, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, saleamt, book, page parceltype, accesstype, iucnclass, placename, placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit, placefp, zoningurl PARCEL 29 mapped · 26 transformed · 26 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL parcel_number pin alternate_parcel_number taxparcelnumberalt taxparcelnumber class taxpropertyclass taxzoning taxfarmbuilding taxnonfarmbuilding taxnonfarmland taxfarmland taxassessedlast gross_acreage taxgrossacres sale_date owner1_name owner2_name owner1_address owner2_address taxownercity taxownerstate taxownerzip site_address taxsiteaddress taxparcelcity taxparcelstate taxparcelzip legal_description taxlegaldescription township taxblock taxlot date_added sourceurl geom taxtownshipname mailto_address homesite_acreage farm_acreage taxtaxcode taxtownship taxsitecsz taxhomesiteacres taxfarmacres taxstatus taxlotdimension taxdocumentno1 taxowner1name taxowner1address1 taxowner1address2 taxowner1csz taxdocumentno2 taxowner2name taxowner2address1 taxowner2address2 taxowner2csz taxdateofsale taxmailtoname taxmailtoaddress1 taxmailtoaddress2 parcelid COALESCE(NULLIF(trim(parcel_number), '')::text, NULLIF(trim(pin… parcelid2 COALESCE(NULLIF(trim(alternate_parcel_number), '')::text, NULLI… taxacctnum NULLIF(trim(taxparcelnumber), '')::text usecode COALESCE(NULLIF(trim("class"), '')::text, NULLIF(trim(taxproper… zoningcode NULLIF(trim(taxzoning), '')::text imprvalue CASE WHEN COALESCE(NULLIF(replace(trim(taxfarmbuilding), ',', '… landvalue NULLIF(replace(trim(taxnonfarmland), ',', ''), '')::text agvalue NULLIF(replace(trim(taxfarmland), ',', ''), '')::text totalvalue NULLIF(replace(trim(taxassessedlast), ',', ''), '')::text taxacres COALESCE(NULLIF(trim(gross_acreage), '')::text, NULLIF(trim(tax… saledate ownername NULLIF(concat_ws(';', NULLIF(trim(owner1_name), ''), NULLIF(tri… owneraddr COALESCE(NULLIF(trim(owner1_address), '')::text, NULLIF(trim(ow… ownercity NULLIF(trim(taxownercity), '')::text ownerstate NULLIF(trim(taxownerstate), '')::text ownerzip NULLIF(trim(taxownerzip), '')::text parceladdr COALESCE(NULLIF(trim(site_address), '')::text, NULLIF(trim(taxs… parcelcity NULLIF(trim(taxparcelcity), '')::text parcelstate NULLIF(trim(taxparcelstate), '')::text parcelzip NULLIF(trim(taxparcelzip), '')::text legaldesc COALESCE(NULLIF(trim(legal_description), '')::text, NULLIF(trim… township NULLIF(trim(township), '')::text block NULLIF(trim(taxblock), '')::text lot NULLIF(trim(taxlot), '')::text updated sourceurl NULLIF(trim(sourceurl), '')::text geom taxdistrict NULLIF(trim(taxtownshipname), '')::text extras json_build_object( 'mailto_address', mailto_address::text, 'hom… not present in source — filled with NULL (26) taxyear, usedesc, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, saleamt, section, qtrsection range, plssdesc, book, page, parentid, heatfuel, fireplaces, heating, cooling, foundation, roofcover, siding

Neighboring counties

Parcel data for counties bordering Mason County:

Frequently asked questions

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

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

How many parcels are in Mason County, IL?

The current dataset contains 16,655 parcel records for Mason County, IL, each with its boundary geometry and assessor attributes.

What is the FIPS code for Mason County, IL?

The FIPS code for Mason County, IL is 17125.

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

Each Mason 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 Mason County, IL parcel data free?

You can preview Mason 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 Mason County, IL have an official GIS or property records website?

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

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated