
Cerro Gordo County
- State:
- Iowa
- County Seat:
- Mason City
Cerro Gordo County's estimated 2025 population is 42,366 with a growth rate of -0.05% in the past year according to the most recent United States census data. Cerro Gordo County is the 13th largest county in Iowa. The 2010 population was 44,097 and has seen a growth of -3.93% since that time.