New Plymouth is a city of 1,794 people in Idaho. The median age is 32.7, younger than the US median of 38.9. The foreign-born share is 1%. The population is up 28% since 2000. 75% of homes are owner-occupied. There are 2,608 people per square mile.
At a glance
Lower income
median household income $65,375, below the US median
US median: $82,259
Younger
median age 32.7
US median: 38.9
Less educated
29% hold a bachelor's degree
US average: 36%
Less affordable
home values up 103%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about New Plymouth
What changed most since 1990
Median home value (2024 dollars)$85,922 → $277,500(+223%)US over the same years: +67%
Poverty rate24.3% → 9.4%(−14.9 pts)US over the same years: −0.8 pts
Median household income (2024 dollars)$38,327 → $65,375(+71%)US over the same years: +14%
New Plymouth's population equals 6.7% of Payette County's. Its number of households without a car equals 1.1% of the county's. Its number of foreign-born residents equals 1.2% of the county's.
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)49.6%(63)
US avg: 26.4%
Gulf War (1990s)25.2%(32)
US avg: 24.3%
Vietnam era32.3%(41)
US avg: 33.1%
Korean War0%(0)
US avg: 4.5%
World War II2.4%(3)
US avg: 1%
Share of the 127 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
New Plymouth, decade by decade
New Plymouth population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
1,313
$38,327
$85,922
11.6%
16.8
2000
1,400
$55,604
$136,442
9.3%
27.6
2010
1,538
$52,396
$153,639
11.9%
35.1
2020
1,494
$63,801
$177,927
33.9%
43.8
2024
1,794
$65,375
$277,500
28.9%
48.0
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
