New Plymouth is a city located in Payette County Idaho. With a 2020 population of 1,644, it is the 68th largest city in Idaho and the 8374th largest city in the United States . New Plymouth is currently growing at a rate of 2.81% annually and its population has increased by 6.89% since the most recent census, which recorded a population of 1,538 in 2010. New Plymouth reached it's highest population of 1,644 in 2021. Spanning over 1 miles, New Plymouth has a population density of 2,391 people per square mile.
The average household income in New Plymouth is $62,194 with a poverty rate of 16.08%. The median rental costs in recent years comes to $710 per month, and the median house value is $115,400. The median age in New Plymouth is 37.5 years, 32.5 years for males, and 40.9 years for females.