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Grant County, WI Parcels & GIS Data

Grant County, WI parcel data: 48,705 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Grant County, Wisconsin parcel data covering 48,705 property records.

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

Grant County is the most southwestern county in the U.S. state of Wisconsin. As of the 2020 census, the population was 51,938. Its county seat is Lancaster and its largest city is Platteville.

FIPS 55043

Official county website: http://www.co.grant.wi.gov

The FIPS code for Grant County is 55043.

Explore Grant County data
Jo DaviessDubuqueClaytonLafayetteIowaRichlandCrawfordGrant
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Attribute coverage

Grant County contains 48,705 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%48,705
parcelid100%48,705
parcelid2100%48,705
ogparcelid100%48,705
ogparcelid2100%48,705
parentid<0.1%0
stackid<0.1%0
geoid100%48,705
statefp100%48,705
countyfp100%48,705
countyname100%48,705
cousubfp100%48,705
cousubname100%48,705
tractce100%48,705
tractname100%48,705
taxacctnum99.9%48,674
taxyear100%48,692
taxdistrict100%48,688
usecode91.7%44,677
usedesc<0.1%0
zoningcode<0.1%0
zoningdesc<0.1%0
numbldgs<0.1%21
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
imprvalue45.3%22,048
landvalue91.7%44,644
agvalue<0.1%0
totalvalue91.7%44,653
taxacres98.0%47,754
calcarea100%48,705
saleamt<0.1%0
saledate<0.1%0
ownertype100%48,686
ownername100%48,686
owneraddr99.9%48,677
ownercity<0.1%8
ownerstate<0.1%8
ownerzip<0.1%8
parceladdr45.8%22,325
parcelcity99.9%48,680
parcelstate100%48,705
parcelzip100%48,705
legaldesc<0.1%8
township99.9%48,665
section99.9%48,665
qtrsection99.9%48,665
range99.9%48,665
plssdesc99.9%48,665
book<0.1%6
page<0.1%6
block<0.1%8
lot<0.1%8
parceltype0.9%428
accesstype0.9%428
iucnclass0.5%264
placename3.6%1,773
placetype3.6%1,749
firmid99.9%48,657
firmdate99.9%48,657
fldzone99.9%48,657
zonesubty96.8%47,127
staticbfe<0.1%18
elevmin99.8%48,620
elevmax99.8%48,620
elevavg99.8%48,620
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
naicscode20.5%9,974
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%48,693
centroidx100%48,705
centroidy100%48,705
surfpointx100%48,705
surfpointy100%48,705
geom100%48,705
extras100%48,705
ownerlist99.9%48,673

Schema mapping

How source columns from the acquired Grant 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 — Grant County, Wisconsin (55043) 1 entity · most recent acquisition per entity · generated 2026-08-08 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 stateid taxparcelid taxrollyear propclass impvalue lndvalue cntassdvalue assdacres ownernme1 pstladress siteadress placename state zipcode loaddate geom schooldist 29 cols ⇢ parcelid parcelid2 taxacctnum taxyear usecode imprvalue landvalue totalvalue taxacres ownername owneraddr parceladdr parcelcity parcelstate parcelzip updated 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 100% elevmin 100% elevmax 100% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 96.8% zonesubty 0.0% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 100% township 100% section 100% qtrsection 100% range 100% plssdesc 100% ownerlist lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode imprvalue landvalue totalvalue taxacres calcarea ownertype ownername owneraddr parceladdr parcelcity parcelstate parcelzip township section qtrsection range plssdesc 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 (43) — empty or below 50% fill in this county parentid, stackid, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, agvalue saleamt, saledate, ownercity, ownerstate, ownerzip, legaldesc, book, page, block, lot, parceltype, accesstype, iucnclass, placename, placetype fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit PARCEL 18 mapped · 29 kept in extras · 36 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL parcelid stateid taxparcelid taxrollyear propclass impvalue lndvalue cntassdvalue assdacres ownernme1 pstladress siteadress placename state zipcode loaddate geom schooldist parcelid parcelid2 taxacctnum taxyear usecode imprvalue landvalue totalvalue taxacres ownername owneraddr parceladdr parcelcity parcelstate parcelzip updated geom taxdistrict extras · 29 source columns preserved as json parceldate, ownernme2, addnumprefix, addnum, addnumsuffix prefix, streetname, streettype, suffix, landmarkname unittype, unitid, zip4, schooldistno, improved, forestvalue estfmkvalue, netprpta, grsprpta, auxclass, deedacres gisacres, coname, parcelfips, parcelsrc, shape_area shape_len, longitude, latitude extras not present in source — filled with NULL (36) usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, agvalue, saleamt, saledate ownercity, ownerstate, ownerzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page, block, lot, sourceurl, parentid fireplaces, heating, cooling, foundation, roofcover, siding, heatfuel

Neighboring counties

Parcel data for counties bordering Grant County:

Frequently asked questions

Where can I find Grant County, WI parcel and GIS data?

Land Records publishes a Grant County, WI 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 Grant County, WI dataset as a GeoPackage or CSV.

How many parcels are in Grant County, WI?

The current dataset contains 48,705 parcel records for Grant County, WI, each with its boundary geometry and assessor attributes.

What is the FIPS code for Grant County, WI?

The FIPS code for Grant County, WI is 55043.

What information does each Grant County, WI parcel record include?

Each Grant County, WI 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 Grant County, WI parcel data free?

You can preview Grant County, WI 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 Grant County, WI have an official GIS or property records website?

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

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated