Miami County, Ohio
Miami County: county in Ohio, United States
About
Miami County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 102,506 and a population density of 97 people per km². After 10 years in 2020 county had an estimated population of 107,516 inhabitants. Its county seat is Troy. The county was created 219 years ago in 1807.
County Snapshot
Miami County at a glance
Miami County currently has 12 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
12
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Ohio counties
88
Open related pagesLargest city
TroyPopulation 26,473
Top linked places
Quick Facts about Miami County
| Population | 107,516 (2020) |
| Country | United States of America |
| State | Ohio (United States) |
| Different from | Miami-Dade County, Miami County, Miami County |
| Plate code | 55 |
| Area | 1060 km2 |
| Water as percent of area | 0.8% |
| Land as percent of area | 99.2% |
| Latitude & Longitude | 40.0535,-84.2289 |
| Named for | Miami people |
| Altitude | 886 feet / 270 meters |
| Capital | Troy |
| Establishment | January 16, 1807 |
| Time Zone | America/New_York |
| Local time | 20:25:02 (18th April 2026) |
| Density | 101 Pop. per km² as of 2020 |
| Population growth | 4.66% (2010-2020) |
| Weather | 78℉ Showers And Thunderstorms 7-days weather |
Geography
Miami County is located at 40°3'12"N 84°13'44"W (40.0534500, -84.2288500). It has 5 neighbors: Clark County, Montgomery County, Champaign County, Darke County and Shelby County.
Miami County map
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The largest city of Miami County is Troy with a population of 26,473. Other cities include, Piqua population 21,435, Tipp City population 10,115, West Milton population 4,853 and Covington population 2,718. See all Miami County cities & populated places.
Miami County Populated Places
Cities, towns, neighborhoods & other populated places in Miami County.
| City Name | Population | Title |
|---|---|---|
| Troy | 26,473 | City in Miami County, Ohio, United States |
| Piqua | 21,435 | City in Ohio |
| Tipp City | 10,115 | City in Miami County, Ohio, United States of America |
| West Milton | 4,853 | City in Ohio |
| Covington | 2,718 | Village in Miami County, Ohio |
| Bradford | 1,871 | Village in Darke and Miami counties, Ohio, United States |
| Laura | 497 | Human settlement in Miami County, Ohio, United States of America |
| Fletcher | 486 | Human settlement in Miami County, Ohio, United States of America |
| Potsdam | 295 | Village in Ohio |
| Casstown | 277 | Human settlement in Miami County, Ohio, United States of America |
| Ludlow Falls | 217 | Human settlement in Miami County, Ohio, United States of America |
| Nashville | 183 | Village in Ohio, United States |
Weather
Showers and thunderstorms. Mostly cloudy, with a high near 78. Chance of precipitation is 80%.
7-Day ForecastOfficial website of Miami County
Official Website- Troy
Demographics
The population of Miami County increased by 4.66% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 102,506 | - | census |
| 2011 | 102,734 | 0.22% | estimation process |
| 2012 | 102,934 | 0.19% | estimation process |
| 2013 | 103,213 | 0.27% | estimation process |
| 2014 | 103,856 | 0.62% | estimation process |
| 2015 | 104,075 | 0.21% | estimation process |
| 2016 | 104,553 | 0.46% | estimation process |
| 2017 | 105,200 | 0.62% | estimation process |
| 2018 | 106,042 | 0.79% | estimation process |
| 2019 | 106,987 | 0.88% | estimation process |
| 2020 | 107,516 | 0.49% | estimation process |
People born in Miami County (6)
People born in Miami County, including astronomer Edwin Foster Coddington, Director of the United States Mint Frank Edgar Scobey, Ohio state judge and later a United States federal judge Lester LeFevre Cecil, .
More notable people
- Luther Merritt Swygert (United States federal judge) he was born in 05/02/1905
- Martin K. Gantz (American politician) he was born in 28/01/1862
- Aaron Franklin Shull (zoologist, university professor and author) he was born in 01/08/1881
Other places with the same name (2)
- Miami County, Indiana county in Indiana, United States with a population of 35,328 people.
- Miami County, Kansas county in Kansas, United States with a population of 34,334 people.
Ohio Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Franklin County | 1,324,624 | County in Massachusetts, United States |
| Cuyahoga County | 1,227,883 | County in Ohio, United States |
| Columbus | 884,356 | The fifteenth most populous city in the United States and the center of the Columbus metropolitan area. |
| Hamilton County | 817,985 | County in New York, United States |
| Summit County | 538,866 | County in northern Utah, United States |
| Montgomery County | 531,610 | County in Ohio, United States |
| Lucas County | 428,294 | County in Ohio, United States |
| Butler County | 385,648 | County in Ohio, United States of America |
| Cleveland | 378,589 | The second most populous city in Ohio and the center of the Cleveland metropolitan area. |
| Stark County | 369,772 | County in Ohio, United States |
| Lorain County | 312,172 | County in Ohio, United States |
| Cincinnati | 304,548 | The third most populous city in Ohio and the center of the Cincinnati metropolitan area. |
| Toledo | 271,455 | The fourth most populous city in Ohio and the center of the Toledo metropolitan area. |
| Warren County | 238,412 | County in New York, United States |
| Lake County | 229,569 | County in Ohio, United States |
| Mahoning County | 226,075 | County in Ohio, United States |