Buying in Miami County, Ohio

Miami County at a glance

Miami County is one of 88 counties and county-equivalents in Ohio. Its county seat is Troy. County government publishes its offices and parcel tools online. Official county website. Its 2024 Census Bureau population estimate is 111,950 across 407 square miles of land — about 275 people per square mile. In the FBI's 2024 reported-crime file, agencies here reported 1,443 offenses — 12.89 per 1,000 residents; the breakdown is below.

Records to check before you buy in Miami County

• Property record card — the Miami County assessor / appraisal office. Pull the parcel's assessed-value history, exemption status, and last sale. This is the file your future tax bill is calculated from, and it shows whether the current owner is enjoying exemptions you will not inherit. County government sits in Troy; the official county website is the reliable route to the parcel search and the office directory.
• Deeds & liens — the Miami County recorder / land-records office. Read the deed chain, open liens, easements, and plat maps — the file a listing never mentions.
• Official flood determination. Check the exact parcel on FEMA's National Flood Hazard Layer — not the listing site's licensed model. Zone boundaries cut through streets; the house next door can be in a different zone. Miami County is the primary county for 11 ZIP codes in the Census Bureau's ZIP-to-county crosswalk — and zone lines ignore every one of them.
• The county's reported-crime record. In the FBI's 2024 file, agencies in Miami County reported 1,443 offenses — 12.89 per 1,000 residents; the largest single category was larceny-theft (1,012). The crime section below sets that beside the Ohio county median.
• Registry check. Run the address through the official Ohio registry and note the counts within a mile — then check again the week you close.
• Permits & code history — the Miami building department. Open permits, expired permits, and code cases tell you whether the renovation in the photos was ever inspected. County permitting is run out of Troy.
• School assignment — the district office, not the listing. Only the district's own boundary lookup confirms which school an address is actually zoned for.

County list, land area and population: U.S. Census Bureau (population: 2024 PEP estimate). County seat and official website: Wikidata (CC0), checked 2026-11-04. Flood determinations: FEMA. Registry: Ohio.

Reported crime in Miami County — FBI 2024

Reported crime in Miami County in 2024 was overwhelmingly property crime: agencies logged 1,443 offenses, of which 1,240 were property offenses and 203 violent. The total rate is 12.89 per 1,000 residents (violent 181.3, property 1107.6 per 100,000).

Inside Ohio, the median county in the same file recorded a violent-crime rate of 119 per 100,000 and a property-crime rate of 727 per 100,000 (medians computed from the FBI 2024 county file across 88 counties).

The largest reported categories were larceny-theft (1,012), burglary (161) and aggravated assault (146).

Coverage: 7 of 7 law-enforcement agencies assigned to this county reported at least one month of 2024 offense data to the FBI; 5 reported all 12 months. Counts are reported offenses only (FBI Return A / Arson master files), assigned whole to each agency's primary county; they are not adjusted for non-reporting agencies.

These are offenses reported to law enforcement — not convictions, and not a verdict on any street or address. A CurbFacts report pairs this county record with the ZIP-level picture for the specific address you are buying.

Source: FBI Crime Data Explorer, UCR Return A + Arson master files, data year 2024 (pulled 2026-11-04).

ZIP guides in Miami County

Registry counts and county crime records for the 10 ZIP codes whose primary county is Miami County.

The Ohio rules that apply in Miami County

Traps researched for Ohio buyers: Late disclosure gives only a short rescission window; Selling 'as-is' does not excuse disclosure.

Read the full Ohio guide — disclosure standard, tax math, registry and flood

More Ohio counties

All Ohio counties · Ohio buyer guide