Watonga is a city in Blaine County, Oklahoma, United States. The population was 4,658 at the 2000 census. It is the county seat of Blaine County.
Watonga is located on former Cheyenne-Arapaho Reservation lands that were allotted to individual tribal members and the excess opened to white settlers in the Land Run of 1892. Watonga is named after Arapaho Chief Watonga whose name means "Black Coyote".
One of Watonga's most notable citizens was Clarence Nash (1904 – 1985) whom Walt Disney hired to be the voice of Donald Duck in the 1930s. Nash provided Donald's voice exclusively for over 50 years. Robert J. Helberg, who was born in Watonga, was awarded the Public Service Medal by NASA for his contributions to the Lunar Orbiter program.