Miami County, Ohio | |
|---|---|
 County courthouse in Troy | |
 Flag  Seal | |
 Location within the U.S. state ofOhio | |
| Coordinates:40°03′N84°14′W / 40.05°N 84.23°W /40.05; -84.23 | |
| Country |  United States |
| State |  Ohio |
| Founded | March 1, 1807[1] |
| Named after | Miami people |
| Seat | Troy |
| Largest city | Troy* |
| Area | |
• Total | 410 sq mi (1,100 km2) |
| • Land | 407 sq mi (1,050 km2) |
| • Water | 3.1 sq mi (8.0 km2) 0.8% |
| Population (2020) | |
• Total | 108,774 |
| • Density | 267/sq mi (103/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional districts | 8th,15th |
| Website | www |
Miami County is acounty located in theU.S. state ofOhio. As of the2020 census, the population was 108,774.[2] Itscounty seat isTroy.[3] The county isnamed in honor of theMiami people.[4] Miami County is part of theDayton metropolitan area.
According to theU.S. Census Bureau, the county has a total area of 410 square miles (1,100 km2), of which 407 square miles (1,050 km2) is land and 3.1 square miles (8.0 km2) (0.8%) is water.[5]
| Census | Pop. | Note | %± |
|---|---|---|---|
| 1810 | 3,941 | — | |
| 1820 | 8,851 | 124.6% | |
| 1830 | 12,807 | 44.7% | |
| 1840 | 19,688 | 53.7% | |
| 1850 | 24,999 | 27.0% | |
| 1860 | 29,959 | 19.8% | |
| 1870 | 32,740 | 9.3% | |
| 1880 | 36,158 | 10.4% | |
| 1890 | 39,754 | 9.9% | |
| 1900 | 43,105 | 8.4% | |
| 1910 | 45,047 | 4.5% | |
| 1920 | 48,428 | 7.5% | |
| 1930 | 51,301 | 5.9% | |
| 1940 | 52,632 | 2.6% | |
| 1950 | 61,309 | 16.5% | |
| 1960 | 72,901 | 18.9% | |
| 1970 | 84,342 | 15.7% | |
| 1980 | 90,381 | 7.2% | |
| 1990 | 93,182 | 3.1% | |
| 2000 | 98,868 | 6.1% | |
| 2010 | 102,506 | 3.7% | |
| 2020 | 108,774 | 6.1% | |
| U.S. Decennial Census[6] 1790-1960[7] 1900-1990[8] 1990-2000[9] 2020[2]> | |||
| Race / Ethnicity(NH = Non-Hispanic) | Pop 1980[10] | Pop 1990[11] | Pop 2000[12] | Pop 2010[13] | Pop 2020[14] | % 1980 | % 1990 | % 2000 | % 2010 | % 2020 |
|---|---|---|---|---|---|---|---|---|---|---|
| White alone (NH) | 87,865 | 90,261 | 94,262 | 95,908 | 96,964 | 97.22% | 96.87% | 95.34% | 93.56% | 89.14% |
| Black or African American alone (NH) | 1,765 | 1,769 | 1,923 | 2,063 | 2,559 | 1.95% | 1.90% | 1.95% | 2.01% | 2.35% |
| Native American orAlaska Native alone (NH) | 81 | 149 | 181 | 173 | 152 | 0.09% | 0.16% | 0.18% | 0.17% | 0.14% |
| Asian alone (NH) | 217 | 597 | 770 | 1,213 | 1,644 | 0.24% | 0.64% | 0.78% | 1.18% | 1.51% |
| Native Hawaiian orPacific Islander alone (NH) | x[15] | x[16] | 6 | 13 | 21 | x | x | 0.01% | 0.01% | 0.02% |
| Other race alone (NH) | 67 | 40 | 95 | 110 | 483 | 0.07% | 0.04% | 0.10% | 0.11% | 0.44% |
| Mixed race or Multiracial (NH) | x[17] | x[18] | 910 | 1,685 | 4,752 | x | x | 0.92% | 1.64% | 4.37% |
| Hispanic or Latino (any race) | 386 | 366 | 721 | 1,341 | 2,199 | 0.43% | 0.39% | 0.73% | 1.31% | 2.02% |
| Total | 90,381 | 93,182 | 98,868 | 102,506 | 108,774 | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% |
As of the2020 census, the county had a population of 108,774. The median age was 41.3 years. 23.3% of residents were under the age of 18 and 19.3% of residents were 65 years of age or older. For every 100 females there were 96.9 males, and for every 100 females age 18 and over there were 94.3 males age 18 and over.[19]
The racial makeup of the county was 89.7%White, 2.4%Black or African American, 0.2%American Indian and Alaska Native, 1.5%Asian, <0.1%Native Hawaiian andPacific Islander, 1.0% from some other race, and 5.2% fromtwo or more races.Hispanic or Latino residents of any race comprised 2.0% of the population.[20]
69.4% of residents lived in urban areas, while 30.6% lived in rural areas.[21]
There were 44,086 households in the county, of which 29.6% had children under the age of 18 living in them. Of all households, 51.2% were married-couple households, 17.3% were households with a male householder and no spouse or partner present, and 24.4% were households with a female householder and no spouse or partner present. About 27.5% of all households were made up of individuals and 12.5% had someone living alone who was 65 years of age or older.[19]
There were 46,766 housing units, of which 5.7% were vacant. Among occupied housing units, 70.5% were owner-occupied and 29.5% were renter-occupied. The homeowner vacancy rate was 1.1% and the rental vacancy rate was 5.7%.[19]
As of the2010 United States census, there were 102,506 people, 40,917 households, and 28,626 families living in the county.[22] The population density was 252.1 inhabitants per square mile (97.3/km2). There were 44,256 housing units at an average density of 108.8 units per square mile (42.0 units/km2).[23] The racial makeup of the county was 94.4% white, 2.0% black or African American, 1.2% Asian, 0.2% American Indian, 0.5% from other races, and 1.8% from two or more races. Those of Hispanic or Latino origin made up 1.3% of the population.[22] In terms of ancestry, 34.5% wereGerman, 13.5% wereIrish, 10.2% wereEnglish, and 9.8% wereAmerican.[24]
Of the 40,917 households, 32.3% had children under the age of 18 living with them, 54.7% were married couples living together, 10.5% had a female householder with no husband present, 30.0% were non-families, and 25.3% of all households were made up of individuals. The average household size was 2.48 and the average family size was 2.95. The median age was 40.6 years.[22]
The median income for a household in the county was $51,507 and the median income for a family was $61,190. Males had a median income of $46,133 versus $32,699 for females. The per capita income for the county was $25,006. About 7.0% of families and 9.5% of the population were below thepoverty line, including 14.0% of those under age 18 and 4.8% of those age 65 or over.[25]
As of thecensus[26] of 2000, there were 98,868 people, 38,437 households, and 27,943 families living in the county. Thepopulation density was 243 people per square mile (94 people/km2). There were 40,554 housing units at an average density of 100 units per square mile (39/km2). The racial makeup of the county was 95.78%White, 1.95%Black orAfrican American, 0.19%Native American, 0.79%Asian, 0.01%Pacific Islander, 0.28% fromother races, and 1.00% from two or more races. 0.73% of the population wereHispanic orLatino of any race.
There were 38,437 households, out of which 33.30% had children under the age of 18 living with them, 59.50% weremarried couples living together, 9.70% had a female householder with no husband present, and 27.30% were non-families. 23.20% of all households were made up of individuals, and 9.50% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 2.99.
In the county, the population was spread out, with 25.90% under the age of 18, 7.60% from 18 to 24, 28.40% from 25 to 44, 24.80% from 45 to 64, and 13.20% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 96.20 males. For every 100 females age 18 and over, there were 92.40 males.
The median income for a household in the county was $44,109, and the median income for a family was $51,169. Males had a median income of $37,357 versus $25,493 for females. Theper capita income for the county was $21,669. About 5.10% of families and 6.70% of the population were below thepoverty line, including 9.10% of those under age 18 and 5.60% of those age 65 or over.
Miami County is a Republican stronghold county in presidential elections, with Democrats winning the county only three times in1912,1936, and1964.
| Year | Republican | Democratic | Third party(ies) | |||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| 2024 | 42,678 | 71.80% | 15,969 | 26.87% | 791 | 1.33% |
| 2020 | 41,371 | 71.23% | 15,663 | 26.97% | 1,043 | 1.80% |
| 2016 | 37,079 | 69.84% | 13,120 | 24.71% | 2,895 | 5.45% |
| 2012 | 34,606 | 66.53% | 16,383 | 31.50% | 1,025 | 1.97% |
| 2008 | 33,417 | 63.15% | 18,372 | 34.72% | 1,126 | 2.13% |
| 2004 | 33,992 | 65.67% | 17,606 | 34.01% | 162 | 0.31% |
| 2000 | 26,037 | 60.78% | 15,584 | 36.38% | 1,220 | 2.85% |
| 1996 | 19,509 | 48.77% | 15,540 | 38.85% | 4,956 | 12.39% |
| 1992 | 19,741 | 45.90% | 12,547 | 29.17% | 10,718 | 24.92% |
| 1988 | 24,915 | 68.38% | 11,138 | 30.57% | 381 | 1.05% |
| 1984 | 26,300 | 72.42% | 9,695 | 26.70% | 320 | 0.88% |
| 1980 | 19,928 | 55.65% | 12,893 | 36.01% | 2,987 | 8.34% |
| 1976 | 18,686 | 57.65% | 13,074 | 40.34% | 653 | 2.01% |
| 1972 | 21,226 | 68.44% | 9,121 | 29.41% | 665 | 2.14% |
| 1968 | 16,997 | 50.62% | 13,228 | 39.40% | 3,352 | 9.98% |
| 1964 | 12,985 | 40.12% | 19,379 | 59.88% | 0 | 0.00% |
| 1960 | 22,151 | 65.30% | 11,770 | 34.70% | 0 | 0.00% |
| 1956 | 20,135 | 68.57% | 9,229 | 31.43% | 0 | 0.00% |
| 1952 | 19,525 | 65.11% | 10,462 | 34.89% | 0 | 0.00% |
| 1948 | 13,100 | 56.33% | 10,066 | 43.29% | 89 | 0.38% |
| 1944 | 14,751 | 58.47% | 10,476 | 41.53% | 0 | 0.00% |
| 1940 | 14,725 | 55.52% | 11,799 | 44.48% | 0 | 0.00% |
| 1936 | 11,343 | 44.86% | 12,754 | 50.44% | 1,189 | 4.70% |
| 1932 | 12,157 | 51.95% | 10,677 | 45.62% | 568 | 2.43% |
| 1928 | 16,063 | 72.80% | 5,867 | 26.59% | 136 | 0.62% |
| 1924 | 11,851 | 62.70% | 5,296 | 28.02% | 1,754 | 9.28% |
| 1920 | 13,122 | 60.28% | 8,076 | 37.10% | 572 | 2.63% |
| 1916 | 5,772 | 48.61% | 5,582 | 47.01% | 519 | 4.37% |
| 1912 | 3,615 | 32.49% | 4,310 | 38.74% | 3,200 | 28.76% |
| 1908 | 6,558 | 53.69% | 5,369 | 43.95% | 288 | 2.36% |
| 1904 | 6,793 | 62.44% | 3,646 | 33.51% | 440 | 4.04% |
| 1900 | 6,197 | 53.86% | 5,127 | 44.56% | 181 | 1.57% |
| 1896 | 6,051 | 52.60% | 5,387 | 46.83% | 65 | 0.57% |
| 1892 | 5,110 | 51.26% | 4,271 | 42.84% | 588 | 5.90% |
| 1888 | 5,312 | 53.04% | 4,258 | 42.51% | 446 | 4.45% |
| 1884 | 5,273 | 55.56% | 4,084 | 43.03% | 134 | 1.41% |
| 1880 | 4,928 | 57.33% | 3,604 | 41.93% | 64 | 0.74% |
| 1876 | 4,388 | 55.40% | 3,509 | 44.31% | 23 | 0.29% |
| 1872 | 3,753 | 56.03% | 2,910 | 43.45% | 35 | 0.52% |
| 1868 | 3,958 | 59.82% | 2,659 | 40.18% | 0 | 0.00% |
| 1864 | 3,821 | 61.94% | 2,348 | 38.06% | 0 | 0.00% |
| 1860 | 3,431 | 58.69% | 2,337 | 39.98% | 78 | 1.33% |
| 1856 | 3,171 | 59.63% | 1,988 | 37.38% | 159 | 2.99% |
| Year | Republican | Democratic | Third party(ies) | |||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| 2024 | 39,225 | 66.72% | 17,525 | 29.81% | 2,039 | 3.47% |
Miami County Court of Common Pleas
Municipal Court
The Western Ohio Japanese Language School (オハイオ西部日本語学校Ohaio Seibu Nihongo Gakkō) is asupplementary weekend Japanese school inunincorporated Miami County, nearTroy. It started in April 1988.[30]
Places adjacent to Miami County, Ohio | ||||||||||||||||
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Municipalities and communities ofMiami County, Ohio,United States | ||
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| Townships | ||
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| Other communities | ||
| Footnotes | ‡This populated place also has portions in an adjacent county or counties | |
,40°03′N84°14′W / 40.05°N 84.23°W /40.05; -84.23
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