
Green Mountain
- County:
- Marshall County
- County Seat:
- No
- Area (mi²):
- 0.686
- State:
- Iowa
Green Mountain is a CDP located in Marshall County, Iowa. Green Mountain has a 2025 population of 206. Green Mountain is currently growing at a rate of 2.49% annually and its population has increased by 13.19% since the most recent census, which recorded a population of 182 in 2020.
The average household income in Green Mountain is $58,582 with a poverty rate of 11.43%. The median age in Green Mountain is 63.3 years: 55.8 years for males, and 63.9 years for females.