County · code 39067
Harrison CountyOhio
Harrison County is a county in Ohio with its seat in Cadiz, formed on February 1, 1813, from parts of Jefferson and Tuscarawas counties. The county was named after William Henry Harrison.
- Founded1813
- County seatCadiz
- Named forWilliam Henry Harrison
- Land area402 sq mi + 8.4 sq mi water
- Population14,483 2020 Census
- Parcels mapped17,893 checked 15 October 2026
Where it is
Harrison on the map of Ohio
Ohio has 88 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1813 from Jefferson County and Tuscarawas County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Harrison County was created on February 1, 1813, from parts of Jefferson County and Tuscarawas County. In 1833, Harrison County gained land from Tuscarawas County and lost land to the creation of Carroll County.
- 1813Harrison County created Harrison created from Jefferson and Tuscarawas. · Ohio Laws 1812, 11th assy., ch. 5., sec. 1/p. 11 and ch. 11/p. 26; Chase, 3:chs. 393, 395/pp. 2116-2117
- 1833Gained territory Harrison gained from Tuscarawas, lost to creation of Carroll. · Ohio Laws 1832, 31st assy., gen., p. 8; Chase, 3:ch. 478/pp. 2146-2147
Land and parcels
What the maps cover in Harrison
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 17,893 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 15 October 2026 · checked 15 October 2026 -
Address points Missing
No public address points layer found for Harrison County yet.
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Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Harrison by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Harrison County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Harrison County.
See your own lot on these maps
Open Harrison County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Harrison County
- When was Harrison County founded?
- Harrison County was founded in 1813, formed from Jefferson County and Tuscarawas County, and named after William Henry Harrison.
- What is the county seat of Harrison County?
- The county seat of Harrison County is Cadiz.
- Is there an online parcel map for Harrison County?
- Yes. A public source publishes a parcel map of 17,893 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Harrison County's boundary or name changed?
- Harrison County was created in 1813 from Jefferson County and Tuscarawas County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Carroll County and Tuscarawas County.
- Is my lot in a flood zone?
- We do not have flood maps for Harrison County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby