Oklahoma Counties by Population (2025)

The most populous counties in Oklahoma are Oklahoma County with 816,490, Tulsa County at 693,514, Cleveland County with 303,952, Canadian County at 181,760, and Comanche County with 121,396. You can get the most current Census population data for all 77 Oklahoma counties, sorted from the most populous counties in Oklahoma to the least, according to the 2024 Population Estimates Program.

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