
Twin Falls County
- State:
- Idaho
- County Seat:
- Twin Falls
Twin Falls County's estimated 2025 population is 97,826 with a growth rate of 1.38% in the past year according to the most recent United States census data. Twin Falls County is the 5th largest county in Idaho. The 2010 population was 77,547 and has seen a growth of 26.15% since that time.