
Addison County
- State:
- Vermont
- County Seat:
- Middlebury
Addison County's estimated 2025 population is 38,050 with a growth rate of 0.44% in the past year according to the most recent United States census data. Addison County is the 7th largest county in Vermont. The 2010 population was 36,813 and has seen a growth of 3.36% since that time.