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Idaho population and growth

How many people live in Idaho and its cities, how fast that is changing, how much of the change is people moving in, and how old Idahoans are.

Data pages

MeasureValueChangeRank
Idaho population2025 (estimate)+22.9% since 2015 · 37th among states2,029,733 ▲+22.9% since 201537th among states
Idaho population density2025 (estimate)45th among states24.6 per sq mi 45th among states
Idaho population growth2025 (estimate)−2.1 pts since 2020 · 2nd among states1.4% ▼−2.1 pts since 20202nd among states
Migration to Idaho2025 (estimate)+194.5% since 2015 · 9th among states19,915 ▲+194.5% since 20159th among states
Idaho population history2020+325.9% since 19201,839,106 ▲+325.9% since 1920
Largest cities in Idahoby category
Boise population2025 (estimate)+1.0% since 2020 · 1st of 19 among cities238,429 ▲+1.0% since 20201st of 19 among cities
Meridian population2025 (estimate)+19.6% since 2020 · 2nd of 19 among cities142,988 ▲+19.6% since 20202nd of 19 among cities
Nampa population2025 (estimate)+18.7% since 2020 · 3rd of 19 among cities120,384 ▲+18.7% since 20203rd of 19 among cities
Idaho Falls population2025 (estimate)+8.9% since 2020 · 5th of 19 among cities71,785 ▲+8.9% since 20205th of 19 among cities
Caldwell population2025 (estimate)+26.2% since 2020 · 4th of 19 among cities76,629 ▲+26.2% since 20204th of 19 among cities
Pocatello population2025 (estimate)+3.4% since 2020 · 6th of 19 among cities58,771 ▲+3.4% since 20206th of 19 among cities
Coeur d'Alene population2025 (estimate)+5.9% since 2020 · 7th of 19 among cities58,179 ▲+5.9% since 20207th of 19 among cities
Twin Falls population2025 (estimate)+7.9% since 2020 · 8th of 19 among cities56,216 ▲+7.9% since 20208th of 19 among cities
Post Falls population2025 (estimate)+18.8% since 2020 · 9th of 19 among cities46,715 ▲+18.8% since 20209th of 19 among cities
Rexburg population2025 (estimate)+1.3% since 2020 · 10th of 19 among cities40,334 ▲+1.3% since 202010th of 19 among cities
Idaho population by race and ethnicity2024 (estimate)+15.2% since 2014 · 36th among states1,558,007 ▲+15.2% since 201436th among states
Idaho median age2024 (estimate)+5.3% since 2014 · 44th among states37.8 years +5.3% since 201444th among states
Where people moving to Idaho come from2024 (estimate)−5.3% since 201980,717 ▼−5.3% since 2019
Lewiston population2025 (estimate)+1.4% since 2020 · 11th of 19 among cities34,717 ▼+1.4% since 202011th of 19 among cities
Eagle population2025 (estimate)+9.6% since 2020 · 12th of 19 among cities34,658 ▲+9.6% since 202012th of 19 among cities
Kuna population2025 (estimate)+28.5% since 2020 · 13th of 19 among cities31,525 ▲+28.5% since 202013th of 19 among cities
Moscow population2025 (estimate)+4.7% since 2020 · 14th of 19 among cities26,721 ▲+4.7% since 202014th of 19 among cities
Star population2025 (estimate)+81.7% since 2020 · 15th of 19 among cities20,874 ▲+81.7% since 202015th of 19 among cities
Ammon population2025 (estimate)+12.5% since 2020 · 16th of 19 among cities20,119 ▼+12.5% since 202016th of 19 among cities
Hayden population2025 (estimate)+10.9% since 2020 · 17th of 19 among cities17,363 ▲+10.9% since 202017th of 19 among cities
Chubbuck population2025 (estimate)+7.3% since 2020 · 18th of 19 among cities16,823 ▲+7.3% since 202018th of 19 among cities
Mountain Home population2025 (estimate)+4.5% since 2020 · 19th of 19 among cities16,779 +4.5% since 202019th of 19 among cities
Downtown Boise and the Capitol from the foothills.
Downtown Boise and the Capitol from the foothills. Photo: Pixabay.

Sources

In use

  • U.S. Census Bureau: Population Estimates Program; Gazetteer Files, 2025 and 2026 (counties and states); Decennial Census population counts; American Community Survey, 1-Year Estimates; State-to-State Migration Flows, American Community Survey 1-Year Estimates

This page was last updated .