Union City is a town in Canadian County, Oklahoma, United States.

The local economy was based on agriculture, and within four years the town had three grain elevators and a farm machinery dealership.

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.

Oklahoma State Highway 152 leads east from Union City 12 miles (19 km) to Mustang.

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.

[10] The city's economy is still supported by goods and services for the local agriculture industry.