
Johnston County
- State:
- Oklahoma
- County Seat:
- Tishomingo
Johnston County's estimated 2025 population is 9,956 with a growth rate of -1.29% in the past year according to the most recent United States census data. Johnston County is the 57th largest county in Oklahoma. The 2010 population was 11,003 and has seen a growth of -9.52% since that time.