Kansas.

1. 01Johnson County2025 population estimate 636,906
2. 02Sedgwick County2025 population estimate 538,433
3. 03Shawnee County2025 population estimate 178,607
4. 04Wyandotte County2025 population estimate 170,597
5. 05Douglas County2025 population estimate 120,920
6. 06Leavenworth County2025 population estimate 84,590
7. 07Riley County2025 population estimate 72,598
8. 08Butler County2025 population estimate 69,484
9. 09Reno County2025 population estimate 61,539
10. 10Saline County2025 population estimate 53,377

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