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Union County, OH Parcels & GIS Data

Union County, OH parcel data: 36,024 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Union County, Ohio parcel data covering 36,024 property records.

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

Union County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 62,784. Its county seat is Marysville.

FIPS 39159

Official county website: http://www.co.union.oh.us

The FIPS code for Union County is 39159.

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Attribute coverage

Union County contains 36,024 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%36,024
parcelid99.7%35,930
parcelid294.1%33,911
ogparcelid99.8%35,959
ogparcelid294.3%33,985
parentid<0.1%0
stackid<0.1%0
geoid100%36,024
statefp100%36,024
countyfp100%36,024
countyname100%36,024
cousubfp100%36,024
cousubname100%36,024
tractce100%36,024
tractname100%36,024
taxacctnum98.2%35,390
taxyear0.2%65
taxdistrict95.1%34,276
usecode94.3%33,976
usedesc0.1%19
zoningcode<0.1%0
zoningdesc<0.1%0
numbldgs100%36,024
numunits2.8%1,000
yearbuilt<0.1%0
numfloors2.8%1,006
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
taxacres94.3%33,973
calcarea100%36,024
saleamt<0.1%0
saledate85.1%30,672
ownertype94.5%34,032
ownername94.5%34,032
owneraddr0.2%78
ownercity<0.1%13
ownerstate<0.1%13
ownerzip<0.1%13
parceladdr98.8%35,576
parcelcity98.7%35,571
parcelstate100%36,024
parcelzip100%36,024
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
parceltype0.9%321
accesstype0.9%321
iucnclass0.2%60
placename4.3%1,537
placetype4.2%1,508
firmid100%36,024
firmdate100%36,024
fldzone100%36,024
zonesubty95.6%34,456
staticbfe<0.1%0
elevmin98.5%35,473
elevmax98.5%35,473
elevavg98.5%35,473
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
naicscode18.9%6,805
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%36,024
centroidx100%36,024
centroidy100%36,024
surfpointx100%36,024
surfpointy100%36,024
geom100%36,024
extras100%36,024
ownerlist<0.1%0

Schema mapping

How source columns from the acquired Union 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 — Union County, Ohio (39159) 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 stateparcelid localparcelid stateluc landarea mailaddressall mailcity mailstate mailzip situsaddressall county camadatasite geom 8 cols ⇢ parcelid parcelid2 usedesc taxacres owneraddr ownercity ownerstate ownerzip parceladdr township sourceurl geom extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 0.2% taxyear 100% updated geom · derived from geometry geom dem.us_1m · USGS 1m DEM 98.5% elevmin 98.5% elevmax 98.5% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 95.6% zonesubty 100% firmdate 100% firmid supplemented · derived / other pipelines 98.2% taxacctnum 95.1% taxdistrict 94.3% usecode 100% numbldgs 85.1% saledate 94.5% ownertype 94.5% ownername 98.7% parcelcity 100% parcelstate 100% parcelzip lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode usedesc numbldgs taxacres calcarea saledate ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip township firmid firmdate fldzone zonesubty elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras publish.parcel_layer columns not fed by these sources (46) — empty or below 50% fill in this county parentid, stackid, zoningcode, zoningdesc, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, imprvalue, landvalue agvalue, totalvalue, saleamt, legaldesc, section, qtrsection, range, plssdesc, book, page, block, lot, parceltype, accesstype, iucnclass placename, placetype, staticbfe, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype, naicscode, frsid, dfrurl caapermit, cwapermit, rcrapermit, ownerlist PARCEL 12 mapped · 8 kept in extras · 42 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL stateparcelid localparcelid stateluc landarea mailaddressall mailcity mailstate mailzip situsaddressall county camadatasite geom parcelid parcelid2 usedesc taxacres owneraddr ownercity ownerstate ownerzip parceladdr township sourceurl geom extras · 8 source columns preserved as json mailnumber, mailstreetprefix, mailstreetname mailstreetsuffix, mailunitnumber, landarea_py, currentto globalid extras not present in source — filled with NULL (42) taxacctnum, taxyear, usecode, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths imprvalue, landvalue, agvalue, totalvalue, saleamt, saledate, ownername, parcelcity, parcelstate, parcelzip, legaldesc, section, qtrsection range, plssdesc, book, page, block, lot, updated, taxdistrict, parentid, fireplaces, heating, cooling, foundation, roofcover, siding, heatfuel

Neighboring counties

Parcel data for counties bordering Union County:

Frequently asked questions

Where can I find Union County, OH parcel and GIS data?

Land Records publishes a Union County, OH 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 Union County, OH dataset as a GeoPackage or CSV.

How many parcels are in Union County, OH?

The current dataset contains 36,024 parcel records for Union County, OH, each with its boundary geometry and assessor attributes.

What is the FIPS code for Union County, OH?

The FIPS code for Union County, OH is 39159.

What information does each Union County, OH parcel record include?

Each Union County, OH 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 Union County, OH parcel data free?

You can preview Union County, OH 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 Union County, OH have an official GIS or property records website?

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

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated