Montgomery County, Ohio
Montgomery County, Ohio
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Montgomery County, Ohio

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Montgomery County, Ohio

Montgomery County is in the southwestern part of the U.S. state of Ohio. At the 2020 census, the population was 537,309, making it the fifth-most populous county in Ohio. The county seat is Dayton. The county was named in honor of Richard Montgomery, an American Revolutionary War general, who was killed in 1775 while attempting to capture Quebec City, Canada. Montgomery County is part of the Dayton, Ohio, Metropolitan Statistical Area.

The county has a total area of 464 square miles (1,200 km2), of which 462 square miles (1,200 km2) is land and 2.8 square miles (7.3 km2) (0.6%) is water.

As of the 2020 census, the county had a population of 537,309. The median age was 39.6 years. 21.7% of residents were under the age of 18 and 18.5% of residents were 65 years of age or older. For every 100 females there were 93.3 males, and for every 100 females age 18 and over there were 90.5 males age 18 and over.

The racial makeup of the county was 67.9% White, 21.2% Black or African American, 0.3% American Indian and Alaska Native, 2.4% Asian, <0.1% Native Hawaiian and Pacific Islander, 1.9% from some other race, and 6.3% from two or more races. Hispanic or Latino residents of any race comprised 3.9% of the population.

94.5% of residents lived in urban areas, while 5.5% lived in rural areas.

There were 228,536 households in the county, of which 27.0% had children under the age of 18 living in them. Of all households, 38.6% were married-couple households, 21.5% were households with a male householder and no spouse or partner present, and 32.5% were households with a female householder and no spouse or partner present. About 34.3% of all households were made up of individuals and 13.8% had someone living alone who was 65 years of age or older.

There were 251,523 housing units, of which 9.1% were vacant. Among occupied housing units, 60.2% were owner-occupied and 39.8% were renter-occupied. The homeowner vacancy rate was 1.5% and the rental vacancy rate was 8.4%.

As of the 2010 census, there were 535,153 people, 223,943 households, and 138,060 families living in the county. The population density was 1,159.5 inhabitants per square mile (447.7/km2). There were 254,775 housing units at an average density of 552.0 per square mile (213.1/km2). The racial makeup of the county was 73.9% white, 20.9% black or African American, 1.7% Asian, 0.2% American Indian, 0.8% from other races, and 2.4% from two or more races. Those of Hispanic or Latino origin made up 2.3% of the population. In terms of ancestry, 24.9% were German, 12.8% were Irish, 9.7% were American, and 8.8% were English.

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