County · code 18081
Johnson CountyIndiana
Johnson County is a county in Indiana with its seat in Franklin, formed in 1823.
- Founded1823
- County seatFranklin
- Named forJohn Johnson
- Land area320 sq mi + 1.4 sq mi water
- Population161,765 2020 Census
- Parcels mapped71,793 checked 15 October 2026
Where it is
Johnson on the map of Indiana
Indiana has 92 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1823 from Delaware County and Adams County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Johnson County was created in 1823 from unattached parts of Delaware and Adams counties as part of the New Purchase.
- 1823Johnson County created Johnson created from the unattached part of Delaware New Purchase (later Adams New Purchase); mistake in description corrected 2 February 1832. · Ind. Acts 1822, 7th sess., ch. 15, sec. 1/p. 22
- 1832Boundary clarified Johnson boundaries were redefined, correcting mistake of 5 May 1823 (no change).no change· Ind. Acts 1831, 16th sess., ch. 176/p. 267
Land and parcels
What the maps cover in Johnson
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 71,793 parcels from Indiana Geographic Information Office (IndianaMap). Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 6 October 2026 · checked 15 October 2026 -
Address points Official
One point per address, 72,050 in all from Indiana Geographic Information Office (IGIO).
edited 8 March 2026 · 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
Johnson 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.
Zoning and code
County government
- County government
The official website of Johnson County.
See your own lot on these maps
Open Johnson 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 Johnson County
- When was Johnson County founded?
- Johnson County was founded in 1823, formed from Delaware County and Adams County, and named after John Johnson.
- What is the county seat of Johnson County?
- The county seat of Johnson County is Franklin.
- Is there an online parcel map for Johnson County?
- Yes. Indiana Geographic Information Office (IndianaMap) publishes a parcel map of 71,793 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Johnson County's boundary or name changed?
- Johnson County was created in 1823 from Delaware County and Adams County. Its boundary has been clarified one time since, with no change on the ground.
- Is my lot in a flood zone?
- We do not have flood maps for Johnson County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby