There are 77 counties in Oklahoma. All counties are functioning governments, each governed by a board of county commissioners.
There are 305 county subdivisions in Oklahoma. They are all census county divisions (CCDs), which are delineated for statistical purposes, have no legal function, and are not governmental units.
Oklahoma Counties - Populated Places in 77 Counties
Also see County: Census Data | Physical, Cultural & Historical Features | ZIP Codes | Land, Farms, & Ranches