Oklahoma Counties by Population (2025)

The most populous counties in Oklahoma are Oklahoma County with 808,866, Tulsa County at 682,868, Cleveland County with 301,193, Canadian County at 175,829, and Comanche County with 121,574. 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 2023 Population Estimates Program.

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