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Where am ILOCATED

Miami County, Ohio

Miami County, Ohio, has 112,634 residents (July 2025 estimate). Its county seat is Troy. It uses Eastern Time and covers 407 sq mi (1,053 km²) of land.

ColumbusClevelandCincinnati
Miami County in Ohio
TroyPiquaTipp CityUnion
Miami County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
112,634
Land area
407 sq mi (1,053 km²)
County seat or government
Troy
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$76,817 ± $2,939
Median home value
$229,100 ± $7,621
Median rent, with utilities
$966 ± $34
Homes lived in by their owners
73.4% ± 1.4 points
County type
County
Metro or micro area
Dayton-Kettering-Beavercreek, OH metro areaOutlying county
Water area
3.06 sq mi (7.92 km²)
State
Ohio
County code (FIPS)
39109
Coordinates (central point)
40.053326, -84.228413
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Miami County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/New_YorkUTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 4542450,725 people
  2. 4537337,565 people
  3. 4535625,237 people
  4. 4537122,865 people
  5. 4532220,884 people
  6. 4534416,979 people
  7. 4530911,876 people
  8. 453047,599 people
  9. 453836,912 people
  10. 453185,511 people
  11. 453084,385 people
  12. 453592,160 people
All 18
  1. 453371,703 people
  2. 453261,446 people
  3. 453171,187 people
  4. 453121,086 people
  5. 453391,057 people
  6. 45361253 people

18 ZIP Code areas overlap Miami County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Miami County, largest first

  1. Concord Township31,873 people
  2. Monroe Township16,358 people
  3. Union Township9,731 people
  4. Newberry Township6,484 people
  5. Bethel Township4,835 people
  6. Newton Township3,539 people
  7. Staunton Township2,313 people
  8. Springcreek Township2,268 people
  9. Elizabeth Township1,857 people
  10. Lostcreek Township1,464 people
  11. Washington Township1,419 people
  12. Brown Township976 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Ohio, by county

School districts in Miami County, largest first

  1. Northmont City School District35,202 people
  2. Troy City School District31,600 people
  3. Piqua City School District24,006 people
  4. Tecumseh Local School District18,431 people
  5. Tipp City Exempted Village School District15,596 people
  6. Bethel Local School District10,503 people
  7. Milton-Union Exempted Village School District9,665 people
  8. Miami East Local School District8,592 people
  9. Covington Exempted Village School District5,088 people
  10. Franklin Monroe Local School District3,586 people
  11. Newton Local School District3,562 people
  12. Bradford Exempted Village School District3,012 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Huber Heights, Ohio (city)43,455 people
  2. Troy, Ohio (city)26,842 people
  3. Piqua, Ohio (city)20,646 people
  4. Tipp City, Ohio (city)10,439 people
  5. Union, Ohio (city)7,037 people
  6. West Milton, Ohio (village)4,771 people
  7. Covington, Ohio (village)2,596 people
  8. Bradford, Ohio (village)1,674 people
  9. Pleasant Hill, Ohio (village)1,526 people
  10. Fletcher, Ohio (village)719 people
  11. Laura, Ohio (village)436 people
  12. Casstown, Ohio (village)259 people
All 15
  1. Potsdam, Ohio (village)253 people
  2. Brandt, Ohio (CDP)210 people
  3. Ludlow Falls, Ohio (village)105 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Shelby County, Ohio20 mi north
  2. Montgomery County, Ohio21 mi south
  3. Darke County, Ohio21 mi west
  4. Champaign County, Ohio25 mi east
  5. Clark County, Ohio25 mi east

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.