[3] Stephens County comprises the Duncan, OK micropolitan statistical area.

County offices were located in rented facilities in Duncan until the first courthouse was built in 1921.

[3] The company has since grown into a multinational corporation with headquarters in Dubai and Houston, Texas.

Although no major river is in the county, some creeks provide drainage.

Wildhorse Creek in the eastern part flows into the Washita River.

Beaver Creek in the western part of the county flows into the Red River.

25.30% of all households were made up of individuals, and 12.80% had someone living alone who was 65 years of age or older.

According to 2017-2021 census estimates, its median household income was $53,470 with a poverty rate of 18.9%.