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Rock County, WI Parcels & GIS Data

Rock County, WI parcel data: 61,483 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Rock County, Wisconsin parcel data covering 61,483 property records.

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

Rock County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 163,687. Its county seat is Janesville.

FIPS 55105

The FIPS code for Rock County is 55105.

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Attribute coverage

Rock County contains 61,483 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%61,483
parcelid100%61,483
parcelid2100%61,483
ogparcelid100%61,483
ogparcelid2100%61,483
parentid<0.1%0
stackid<0.1%0
geoid100%61,483
statefp100%61,483
countyfp100%61,483
countyname100%61,483
cousubfp100%61,483
cousubname100%61,483
tractce100%61,483
tractname100%61,483
taxacctnum100%61,467
taxyear100%61,467
taxdistrict100%61,470
usecode96.3%59,180
usedesc<0.1%0
zoningcode<0.1%0
zoningdesc<0.1%0
numbldgs67.0%41,178
numunits56.4%34,651
yearbuilt<0.1%0
numfloors0.4%225
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue84.4%51,870
landvalue96.2%59,144
agvalue<0.1%0
totalvalue96.3%59,180
taxacres99.0%60,850
calcarea100%61,483
saleamt<0.1%0
saledate<0.1%0
ownertype100%61,467
ownername100%61,467
owneraddr100%61,467
ownercity<0.1%0
ownerstate<0.1%0
ownerzip<0.1%0
parceladdr91.5%56,233
parcelcity100%61,472
parcelstate100%61,483
parcelzip100%61,483
legaldesc<0.1%0
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
parceltype0.7%416
accesstype0.7%416
iucnclass0.3%204
placename4.7%2,879
placetype4.6%2,826
firmid100%61,483
firmdate100%61,483
fldzone100%61,483
zonesubty98.1%60,323
staticbfe<0.1%4
elevmin98.4%60,493
elevmax98.4%60,493
elevavg98.4%60,493
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
naicscode17.1%10,543
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%61,483
centroidx100%61,483
centroidy100%61,483
surfpointx100%61,483
surfpointy100%61,483
geom100%61,483
extras100%61,483
ownerlist<0.1%0

Schema mapping

How source columns from the acquired Rock 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 — Rock County, Wisconsin (55105) 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 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 98.4% elevmin 98.4% elevmax 98.4% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 98.1% zonesubty 0.0% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 67.0% numbldgs 56.4% numunits lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode numbldgs numunits imprvalue landvalue totalvalue taxacres calcarea ownertype ownername owneraddr parceladdr parcelcity parcelstate parcelzip firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras publish.parcel_layer columns not fed by these sources (47) — empty or below 50% fill in this county parentid, stackid, usedesc, zoningcode, zoningdesc, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, agvalue, saleamt, saledate ownercity, ownerstate, ownerzip, legaldesc, township, section, qtrsection, range, plssdesc, book, page, block, lot, parceltype, accesstype iucnclass, placename, placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype, naicscode, frsid, dfrurl caapermit, cwapermit, rcrapermit, ownerlist 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 Rock County:

Frequently asked questions

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

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

How many parcels are in Rock County, WI?

The current dataset contains 61,483 parcel records for Rock County, WI, each with its boundary geometry and assessor attributes.

What is the FIPS code for Rock County, WI?

The FIPS code for Rock County, WI is 55105.

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

Each Rock 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 Rock County, WI parcel data free?

You can preview Rock 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.

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated