
Madison County
- State:
- Alabama
- County Seat:
- Huntsville
Madison County's estimated 2025 population is 430,590 with a growth rate of 2.13% in the past year according to the most recent United States census data. Madison County is the 2nd largest county in Alabama. The 2010 population was 336,114 and has seen a growth of 28.11% since that time.