
New Plymouth
- County:
- Payette County
- County Seat:
- No
- Area (mi²):
- 0.688
- State:
- Idaho
New Plymouth is a city located in Payette County, Idaho. New Plymouth has a 2025 population of 1,600. New Plymouth is currently growing at a rate of 1.07% annually and its population has increased by 5.68% since the most recent census, which recorded a population of 1,514 in 2020.
The average household income in New Plymouth is $63,594 with a poverty rate of 9.04%. The median age in New Plymouth is 32.4 years: 30.7 years for males, and 40.1 years for females.