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Grant County, WI Parcels & GIS Data

Grant County, WI parcel data: 48,987 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Grant County, Wisconsin parcel data covering 48,987 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.

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Attribute coverage

Grant County contains 48,987 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%48,987
parcelid100%48,973
parcelid2100%48,986
ogparcelid100%48,979
ogparcelid2100%48,986
parentid<0.1%0
stackid<0.1%0
geoid100%48,987
statefp100%48,987
countyfp100%48,987
countyname100%48,987
cousubfp100%48,987
cousubname100%48,987
tractce100%48,987
tractname100%48,987
taxacctnum99.5%48,765
taxyear100%48,987
taxdistrict100%48,967
usecode92.8%45,478
usedesc49.5%24,230
zoningcode2.4%1,187
zoningdesc2.0%987
numbldgs100%48,987
numunits45.8%22,433
yearbuilt<0.1%0
numfloors0.1%71
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue99.8%48,906
landvalue99.8%48,906
agvalue<0.1%0
totalvalue99.8%48,906
taxacres100%48,987
calcarea100%48,987
saleamt<0.1%0
saledate<0.1%0
ownertype100%48,970
ownername100%48,969
owneraddr99.9%48,952
ownercity99.3%48,655
ownerstate99.3%48,665
ownerzip99.4%48,669
parceladdr100%48,966
parcelcity100%48,978
parcelstate100%48,987
parcelzip100%48,987
legaldesc<0.1%0
township99.9%48,947
section99.9%48,947
qtrsection99.9%48,947
range99.9%48,947
plssdesc99.9%48,947
book<0.1%0
page<0.1%0
block<0.1%0
lot<0.1%0
parceltype0.4%181
accesstype0.9%462
iucnclass0.5%269
placename3.7%1,820
placetype3.7%1,797
firmid99.9%48,937
firmdate99.9%48,937
fldzone99.9%48,937
zonesubty96.8%47,414
staticbfe<0.1%14
elevmin99.8%48,904
elevmax99.8%48,904
elevavg99.8%48,904
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
naicscode9.7%4,755
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%48,987
centroidx100%48,987
centroidy100%48,987
surfpointx100%48,987
surfpointy100%48,987
geom100%48,987
extras100%48,987
ownerlist66.9%32,787
placefp31.6%15,497
zoningurl<0.1%2
lbcsactivity96.0%47,037
lbcsfunction94.7%46,407
lbcstype98.7%48,372
lbcscharacter96.8%47,428
lbcsownership100%48,971
sourceurl<0.1%0

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) 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 PARCEL webpin name calculatedarea recordname last_edited_date geom 21 cols ⇢ parcelid parcelid2 taxacres ownername updated geom extras REFTABLE webpin parcelid taxparcelid taxrollyear propclass impvalue lndvalue assdacres ownernme1 ownernme2 pstladress siteadress placename state zipcode landmarkname addnum streetname streettype unitid coname estfmkvalue cntassdvalue schooldist geom 19 cols ⇢ parcelid parcelid2 taxacctnum taxyear usecode imprvalue landvalue taxacres ownername owneraddr parceladdr parcelcity parcelstate parcelzip near house_number road unit state_district appraisedvalue assessedvalue taxdistrict geom extras ZONING zoning geom 8 cols ⇢ zoningcode geom 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% numbldgs 100% totalvalue 99.3% ownercity 99.3% ownerstate 99.4% ownerzip 100% township 100% section 100% qtrsection 100% range 100% plssdesc 66.9% ownerlist 96.0% lbcsactivity 94.7% lbcsfunction 98.7% lbcstype 96.8% lbcscharacter 100% lbcsownership lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode zoningcode numbldgs imprvalue landvalue totalvalue taxacres calcarea ownertype ownername owneraddr ownercity ownerstate ownerzip 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 lbcsactivity lbcsfunction lbcstype lbcscharacter lbcsownership publish.parcel_layer columns not fed by these sources (41) — empty or below 50% fill in this county parentid, stackid, usedesc, zoningdesc, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, agvalue, saleamt, saledate legaldesc, book, page, block, lot, parceltype, accesstype, iucnclass, placename, placetype, fireplaces, heating, heatfuel, cooling, foundation roofcover, siding, bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit, placefp, zoningurl, sourceurl PARCEL 6 mapped · 1 transformed · 21 kept in extras · 48 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL webpin name calculatedarea recordname last_edited_date geom parcelid parcelid2 taxacres ownername updated to_timestamp(last_edited_date / 1000.0)::text geom extras · 21 source columns preserved as json globalid, createdbyrecord, retiredbyrecord, statedarea statedareaunit, miscloseratio, misclosedistance, isseed created_user, created_date, last_edited_user validationstatus, maplbl, historytype, floordesignator floororder, retiredrecname, statedareaunit_decoded isseed_decoded, validationstatus_decoded, historytype_decoded extras not present in source — filled with NULL (48) taxacctnum, taxyear, usecode, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths fullbaths, imprvalue, landvalue, agvalue, totalvalue, saleamt, saledate, owneraddr, ownercity, ownerstate, ownerzip, parceladdr, parcelcity parcelstate, parcelzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page, block, lot, sourceurl, taxdistrict, parentid heatfuel, fireplaces, heating, cooling, foundation, roofcover, siding REFTABLE 23 mapped · 2 transformed · 19 kept in extras · 98 unmapped (NULL) SOURCE COLUMNS HARMONIZED → REFTABLE webpin parcelid taxparcelid taxrollyear propclass impvalue lndvalue assdacres ownernme1 ownernme2 pstladress siteadress placename state zipcode landmarkname addnum streetname streettype unitid coname estfmkvalue cntassdvalue schooldist geom parcelid parcelid2 taxacctnum taxyear usecode imprvalue landvalue taxacres ownername NULLIF( CASE WHEN ownernme1 IS NULL OR btrim(ownernme1) = '' TH… owneraddr parceladdr parcelcity parcelstate parcelzip near house_number road NULLIF(concat_ws(' ', NULLIF(streetname::text, ''), NULLIF(stre… unit state_district appraisedvalue assessedvalue taxdistrict geom extras · 19 source columns preserved as json stateid, parceldate, addnumpref, addnumsuff, prefix, suffix unittype, zip4, schooldistno, improved, forestvalue, netprpta grsprpta, auxclass, deedacres, gisacres, loaddate, parcelfips parcelsrc extras not present in source — filled with NULL (98) usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, bldgsqft, bedrooms, halfbaths, fullbaths, agvalue, totalvalue, saleamt saledate, ownercity, ownerstate, ownerzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page, block, lot, zoningtype zoningordinance, zoningsetbacks, zoningrestrictions, landusecode, landusedesc, lbcsdimension, lbcscode, house, category, level, staircase entrance, po_box, postcode, suburb, city_district, city, island, state, country_region, country, world_region, bldgtype, numfloors, yearremodel livingarea, bldgquality, bldgcondition, architecture, totalrooms, fireplaces, heating, cooling, foundation, attic, atticsqft, intwall, extwall roofstyle, roofcover, roofheight, fsagpfeet, siding, framing, basementsqft, attgaragesqft, detgaragesqft, garagestalls, situsaddress, boatlift boatdock, boathouse, pool, gazebo, irrigation, riprap, solarium, carport, greenhouse, openporch, enclporch, sauna, wooddeck, hottub, patio shed, workshop, sourceurl, parentid, heatfuel ZONING 2 mapped · 8 kept in extras · 7 unmapped (NULL) SOURCE COLUMNS HARMONIZED → ZONING zoning geom zoningcode geom extras · 8 source columns preserved as json fid_, parcelid, maplbl, webpin, gis_acres, label, objectid_1 globalid extras not present in source — filled with NULL (7) zoningdesc, zoningtype, ordinance, setbacks, restrictions, notes, sourceurl

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 48,987 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