County · code 39021
Champaign CountyOhio
Champaign County is in Ohio, with its county seat in Urbana. It was created in 1805 from Franklin and Greene counties.
- Founded1805
- County seatUrbana
- Land area429 sq mi + 0.8 sq mi water
- Population38,714 2020 Census
- Parcels mapped27,968 checked 16 October 2026
Where it is
Champaign 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 1805 from Franklin County and Greene County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Champaign County was created in 1805 from Franklin and Greene. In 1818, it lost territory to the creation of Clark and Logan counties, and lost area to Madison County, with part reverting to a non-county area attached to Logan.
- 1805Champaign County created Champaign created from Franklin and Greene. · Ohio Laws 1804, 3d assy., ch. 69/p. 285; Chase, 3:ch. 342 [sic]/p. 2103
- 1818Lost territory Champaign lost to creation of Clark and Logan, and lost to Madison. Part of Champaign reverted to Non-County Area 9 that was attached to Logan for administrative and judicial purposes. · Ohio Laws 1817, 16th assy., chs. 14, 20, 33/pp. 33, 36, 53, 55, 75; Chase, 3:chs. 413, 415, 418/pp. 2125-2127, 2129
Land and parcels
What the maps cover in Champaign
Who publishes each layer, how good it is, and when we last checked.
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Parcels Fallback
Lot lines and tax-map numbers for 27,968 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey. This copy is a fallback, not the county's own: use it as a guide and check the official record.
edited 11 September 2017 · checked 16 October 2026 -
Address points Official
One point per address, 18,388 in all from Ohio Geographically Referenced Information Program (OGRIP), Ohio DAS/OIT (state GIS office).
edited 24 June 2025 · checked 13 October 2026 -
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
Champaign 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
Champaign 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 Champaign County.
See your own lot on these maps
Open Champaign 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 Champaign County
- When was Champaign County founded?
- Champaign County was founded in 1805, formed from Franklin County and Greene County.
- What is the county seat of Champaign County?
- The county seat of Champaign County is Urbana.
- Is there an online parcel map for Champaign County?
- Yes. A public source publishes a parcel map of 27,968 parcels, rated fallback here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Champaign County's boundary or name changed?
- Champaign County was created in 1805 from Franklin County and Greene County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Clark County, Logan County and Madison County.
- Is my lot in a flood zone?
- We do not have flood maps for Champaign County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby