 KOSU has studios on OSU's campus in this city in what county?
KOSU: KOSU (91.7 FM) is a public radio station operated by Oklahoma State University, with studios on OSU's campus in Stillwater, Oklahoma and in the Film Row district in Oklahoma City, Oklahoma. Stillwater, Oklahoma: Stillwater is a city in north east Oklahoma at the intersection of US-177 and State Highway 51. Stillwater, Oklahoma:  It is the county seat of Payne County, Oklahoma, United States.
Payne County