County · code 39037
Darke CountyOhio
Darke County is a county in Ohio with its seat in Greenville, created in 1809.
- Founded1809
- County seatGreenville
- Named forWilliam Darke
- Land area598 sq mi + 1.6 sq mi water
- Population51,881 2020 Census
- Parcels mapped31,728 checked 15 October 2026
Where it is
Darke 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 1809 from Miami County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Darke County was created from Miami County on January 3, 1809, but was not fully organized at first and remained attached to Miami for administrative and judicial purposes. The county was fully organized on March 1, 1817, and detached from Miami County. Darke County was named after William Darke.
- 1809Darke County created Darke created from Miami; Darke not fully organized, attached to Miami for administrative and judicial purposes. · Ohio Laws 1808, 7th assy., ch. 6/p. 69; Chase, 3:ch. 373/p. 2110
- 1812Changed Part of Montgomery lying north of the Indian Boundary became Non-County Area 6 attached to Darke and indirectly through Darke to Miami; attachment was for administrative and judicial purposes. · Ohio Laws 1811, 10th assy., ch. 13/p. 22; Chase, 3:ch. 390/p. 2115
- 1817Changed Darke fully organized, detached fron Miami; Non-County Area 6 attached directly to Darke for administrative and judicial purposes. · Ohio Laws 1816, 15th assy., ch. 4/p. 5; Chase, 3:ch. 406/p. 2122
- 1820Lost territory Darke lost all of attached Non-County Area 6 to creation of Mercer, Paulding, Van Wert, and Williams. Mercer and Van Wert not fully organized, both attached to Darke for administrative and judicial purposes. · Ohio Laws 1819, 18th assy., loc., ch. 37/pp. 90-93; Chase, 3:ch. 429/pp. 2134-2135
- 1824
- 1848Exchanged territory Darke exchanged with Mercer. · Ohio Laws 1847, 46th assy., loc., secs. 1-4, 7/pp. 128-129
Land and parcels
What the maps cover in Darke
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 31,728 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 13 October 2026 · checked 15 October 2026 -
Address points Official
One point per address, 25,200 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
Darke 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
Who to ask before you build, dig or sell
Official county pages only. We link to them; we do not copy them, because they change.
Inside a city or town, permits usually come from that city rather than the county.
Permits
Zoning and code
County government
- County government
The official website of Darke County.
See your own lot on these maps
Open Darke 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 Darke County
- When was Darke County founded?
- Darke County was founded in 1809, formed from Miami County, and named after William Darke.
- What is the county seat of Darke County?
- The county seat of Darke County is Greenville.
- Is there an online parcel map for Darke County?
- Yes. A public source publishes a parcel map of 31,728 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Darke County's boundary or name changed?
- Darke County was created in 1809 from Miami County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Mercer County, Miami County and Van Wert County.
- Who issues building permits in Darke County?
- The county's page on building permits: Building Permit Portal. Inside a city or town, ask that city first.
- Is my lot in a flood zone?
- We do not have flood maps for Darke County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby