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Union County, OH Parcels & GIS Data

Union County, OH parcel data: 40,372 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Union County, Ohio parcel data covering 40,372 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 40,372 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%40,372
parcelid99.8%40,276
parcelid293.9%37,928
ogparcelid99.8%40,307
ogparcelid298.1%39,596
parentid7.0%2,811
stackid<0.1%0
geoid100%40,372
statefp100%40,372
countyfp100%40,372
countyname100%40,372
cousubfp100%40,372
cousubname100%40,372
tractce100%40,372
tractname100%40,372
taxacctnum85.8%34,633
taxyear100%40,372
taxdistrict83.0%33,516
usecode82.3%33,215
usedesc19.0%7,667
zoningcode13.2%5,323
zoningdesc13.2%5,323
numbldgs45.9%18,525
numunits1.3%514
yearbuilt<0.1%0
numfloors1.3%514
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue91.9%37,098
landvalue91.9%37,098
agvalue91.9%37,098
totalvalue91.9%37,098
taxacres84.3%34,046
calcarea100%40,372
saleamt<0.1%0
saledate74.1%29,923
ownertype99.5%40,162
ownername99.5%40,162
owneraddr0.2%65
ownercity<0.1%0
ownerstate<0.1%0
ownerzip<0.1%0
parceladdr99.9%40,341
parcelcity84.4%34,073
parcelstate100%40,372
parcelzip100%40,372
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
parceltype0.6%232
accesstype1.0%421
iucnclass0.2%81
placename3.7%1,509
placetype3.7%1,482
firmid100%40,372
firmdate100%40,372
fldzone100%40,372
zonesubty93.3%37,676
staticbfe<0.1%0
elevmin98.6%39,806
elevmax98.6%39,806
elevavg98.6%39,806
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
naicscode10.6%4,263
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated45.9%18,525
centroidx100%40,372
centroidy100%40,372
surfpointx100%40,372
surfpointy100%40,372
geom100%40,372
extras100%40,372
ownerlist78.7%31,755
placefp50.0%20,169
zoningurl13.2%5,323
lbcsactivity82.6%33,353
lbcsfunction81.7%32,977
lbcstype83.6%33,766
lbcscharacter83.0%33,511
lbcsownership99.5%40,167
sourceurl86.0%34,704

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) 2 entities · most recent acquisition per entity · generated 2026-10-10 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 parcelid2 totalvalue taxacres ownername parceladdr geom parentid 2 cols ⇢ parcelid parcelid2 totalvalue taxacres ownername parceladdr geom parentid extras ZONING zoning label geom 6 cols ⇢ zoningcode zoningdesc geom extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 100% taxyear 45.9% updated geom · derived from geometry geom dem.us_1m · USGS 1m DEM 98.6% elevmin 98.6% elevmax 98.6% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 93.3% zonesubty 100% firmdate 100% firmid supplemented · derived / other pipelines 85.8% taxacctnum 83.0% taxdistrict 82.3% usecode 91.9% imprvalue 91.9% landvalue 91.9% agvalue 74.1% saledate 84.4% parcelcity 100% parcelstate 100% parcelzip 78.7% ownerlist 82.6% lbcsactivity 81.7% lbcsfunction 83.6% lbcstype 83.0% lbcscharacter 99.5% lbcsownership 86.0% sourceurl lrid parcelid parcelid2 ogparcelid ogparcelid2 parentid geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode zoningcode zoningdesc imprvalue landvalue agvalue totalvalue taxacres calcarea saledate ownertype ownername parceladdr parcelcity parcelstate parcelzip firmid firmdate fldzone zonesubty elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras ownerlist lbcsactivity lbcsfunction lbcstype lbcscharacter lbcsownership sourceurl publish.parcel_layer columns not fed by these sources (47) — empty or below 50% fill in this county stackid, usedesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, saleamt, owneraddr, ownercity, ownerstate ownerzip, legaldesc, township, 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, placefp, zoningurl PARCEL 8 mapped · 2 kept in extras · 46 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL parcelid parcelid2 totalvalue taxacres ownername parceladdr geom parentid parcelid parcelid2 totalvalue taxacres ownername parceladdr geom parentid extras · 2 source columns preserved as json ogparcelid, geoid extras not present in source — filled with NULL (46) taxacctnum, taxyear, usecode, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths fullbaths, imprvalue, landvalue, agvalue, saleamt, saledate, owneraddr, ownercity, ownerstate, ownerzip, parcelcity, parcelstate, parcelzip legaldesc, township, section, qtrsection, range, plssdesc, book, page, block, lot, updated, sourceurl, taxdistrict, heatfuel, fireplaces heating, cooling, foundation, roofcover, siding ZONING 3 mapped · 1 transformed · 6 kept in extras · 6 unmapped (NULL) SOURCE COLUMNS HARMONIZED → ZONING zoning label geom zoningcode zoningdesc NULLIF(label::text, '') geom extras · 6 source columns preserved as json globalid, zoning_lab, created_user, created_date last_edited_user, last_edited_date extras not present in source — filled with NULL (6) zoningtype, ordinance, setbacks, restrictions, notes, sourceurl

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 40,372 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