County · code 18103
Miami CountyIndiana
Miami County is a county in Indiana with its seat in Peru, formed on April 2, 1832.
- Founded1832
- County seatPeru
- Named forMiami people
- Land area374 sq mi + 3.6 sq mi water
- Population35,962 2020 Census
- Parcels mapped23,514 checked 15 October 2026
Where it is
Miami 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 1832 from Cass County and Adams County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Miami County was formed in 1832 from Cass County and Adams County, and named after Miami people. Peru is the county seat.
Deeds and plats from before 1832 for land now in Miami County may have been recorded in Cass County and Adams County.
- 1832Miami County created Miami created from Cass, from Non-County Area 12 attached to Cass, and from part of Adams New Purchase attached to Cass; Miami not fully organized, attached to Cass for administrative and judicial purposes. · Ind. Acts 1831, 16th sess., ch. 119, secs. 3, 5/p. 113
- 1833Boundary clarified Miami boundaries were clarified (no change).no change· Ind. Acts 1832, 17th sess., ch. 39/p. 38
- 1834Gained territory Miami gained from Cass and from Non-County Area 12 attached to Cass; Miami fully organized, detached from Cass. · Ind. Acts 1833, 18th sess., ch. 28/p. 64
- 1838Gained territory Miami gained from Non-County Area 12 attached to Cass. · Ind. Acts 1837, 22d sess., loc., ch. 61, secs. 41, 48, 50, 52, 64-66, 70-71, 75-78/pp. 241-266; Pence and Armstrong, 406
- 1839Changed Part of Adams New Purchase (Great Miami Reservation) was attached to Miami for administrative and judicial purposes. · Ind. Acts 1838, 23d sess., gen., ch. 63/p. 75
- 1844Lost territory Miami lost to Fulton. Miami lost Adams New Purchase attachment to creation of Richardville (now Howard) and Tipton; Richardville and Tipton not fully organized, parts attached to Miami for administrative and judicial purposes. · Ind. Acts 1843, 28th sess., gen., ch. 3, secs. 1-2, 6/pp. 10-11; ch. 61/p. 73
- 1844Changed Richardville (now Howard) and Tipton fully organized, detached from Miami. · Ind. Acts 1843, 28th sess., gen., ch. 3, sec. 6/p. 11
Land and parcels
What the maps cover in Miami
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 23,514 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, 15,478 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
Miami 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.
Records
Zoning and code
County government
- County government
The official website of Miami County.
See your own lot on these maps
Open Miami 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 Miami County
- When was Miami County founded?
- Miami County was founded in 1832, formed from Cass County and Adams County, and named after Miami people.
- What is the county seat of Miami County?
- The county seat of Miami County is Peru.
- Is there an online parcel map for Miami County?
- Yes. Indiana Geographic Information Office (IndianaMap) publishes a parcel map of 23,514 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Miami County's boundary or name changed?
- Miami County was created in 1832 from Cass County and Adams County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Adams County, Cass County and Howard County.
- Who issues building permits in Miami County?
- The county's page on building permits: Permits. Inside a city or town, ask that city first.
- Who issues septic and well permits in Miami County?
- The county's page on septic systems and wells: County Health Office.
- Is my lot in a flood zone?
- We do not have flood maps for Miami County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby