Western Oklahoma

Western Oklahoma is all territory west of Interstate 35, and west of Oklahoma City.

Western Oklahoma can include counties in central Oklahoma, since Oklahoma City serves as the boundary between east and west parts of the state

It is usually broken up into two primary regions: Northwestern Oklahoma and Southwestern Oklahoma.

Coordinates: 35°30′N 99°00′W / 35.5°N 99.0°W / 35.5; -99.0