Region 1 serves the following areas:
- Region 1 Area 1
Beaver, Cimarron, Ellis, Harper, Texas, Woods, Woodward Counties
- Region 1 Area 2
Alfalfa, Garfield, Grant, Kay, Noble Counties
- Region 1 Area 3
Beckham, Blaine, Custer, Dewey, Kingfisher, Major, Roger Mills Counties
- Region 1 Area 4
Caddo, Canadian, Grady, Washita Counties