Union City is a town in Canadian County, Oklahoma, United States. The population was 1,645 at the 2010 census, a 19.6 percent increase from 1,375 at the 2000 census. It is part of the Oklahoma City metropolitan statistical area.
Union City is located in southern Canadian County at 35°24′49″N 97°54′38″W / 35.41361°N 97.91056°W / 35.41361; -97.91056 (35.413582, -97.910634). It is bordered to the east by Oklahoma City, to the north in part by El Reno, and to the south by Grady County, including the town of Minco. The Canadian River forms the county line and the southern boundary of Union City.
U.S. Route 81 passes through the center of the town, leading north 7.5 miles (12.1 km) to Interstate 40 and 10 miles (16 km) to El Reno, while leading south 6 miles (10 km) to Minco. Oklahoma State Highway 152 leads east from Union City 12 miles (19 km) to Mustang. Downtown Oklahoma City is 28 miles (45 km) to the east.
According to the United States Census Bureau, the town of Union City has a total area of 57.1 square miles (147.8 km). 56.6 square miles (146.6 km) of it is land, and 0.46 square miles (1.2 km) of it (0.83%) is water.
As of the 2010 United States Census, there were 1,645 people residing in the town. The population density was 23.3 people per square mile (10/km²). There were 568 housing units at an average density of 12 per square mile (4/km²). The racial makeup of the town was 91.49% White, 1.75% African American, 2.98% Native American, 0.07% Asian, 0.15% Pacific Islander, 0.65% from other races, and 2.91% from two or more races. Hispanic or Latino of any race were 2.33% of the population.
There were 483 households out of which 36.9% had children under the age of 18 living with them, 65.0% were married couples living together, 8.1% had a female householder with no husband present, and 21.9% were non-families. 18.0% of all households were made up of individuals and 6.8% had someone living alone who was 65 years of age or older. The average household size was 2.68 and the average family size was 3.05.
In the town, the population was spread out with 30.8% under the age of 18, 8.5% from 18 to 24, 26.9% from 25 to 44, 24.9% from 45 to 64, and 8.9% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 118.6 males. For every 100 females age 18 and over, there were 104.7 males.
The median income for a household in the town was $40,819, and the median income for a family was $47,417. Males had a median income of $33,646 versus $22,039 for females. The per capita income for the town was $17,020. About 7.4% of families and 8.3% of the population were below the poverty line, including 9.1% of those under age 18 and 9.5% of those age 65 or over.