
St. Johnsbury
- County:
- Caledonia County
- County Seat:
- No
- Area (mi²):
- 12.821
- State:
- Vermont
St. Johnsbury is a CDP located in Caledonia County, Vermont. St. Johnsbury has a 2025 population of 5,905. St. Johnsbury is currently declining at a rate of -0.34% annually but its population has increased by 1.55% since the most recent census, which recorded a population of 5,815 in 2020.
The average household income in St. Johnsbury is $73,861 with a poverty rate of 20.42%. The median age in St. Johnsbury is 43.8 years: 42.5 years for males, and 47.3 years for females.