
Sheridan County
- State:
- Montana
- County Seat:
- Plentywood
Sheridan County's estimated 2025 population is 3,384 with a growth rate of -1.66% in the past year according to the most recent United States census data. Sheridan County is the 41st largest county in Montana. The 2010 population was 3,368 and has seen a growth of 0.48% since that time.