
South Glastonbury
- County:
- Park County
- County Seat:
- No
- Area (mi²):
- 17.492
- State:
- Montana
South Glastonbury is a CDP located in Park County, Montana. South Glastonbury has a 2025 population of 345. South Glastonbury is currently growing at a rate of 7.14% annually but its population has decreased by -8.97% since the most recent census, which recorded a population of 379 in 2020.
The average household income in South Glastonbury is $65,666 with a poverty rate of 7.6%. The median age in South Glastonbury is 60 years: 59.5 years for males, and 60.6 years for females.