
Fayette County
- State:
- Iowa
- County Seat:
- West Union
Fayette County's estimated 2025 population is 19,098 with a growth rate of -0.29% in the past year according to the most recent United States census data. Fayette County is the 35th largest county in Iowa. The 2010 population was 20,860 and has seen a growth of -8.45% since that time.