U.S. state profile · ID
Idaho: area, population and density
Idaho has 82,645 sq mi of land and a 2025 population estimate of 2,029,733; calculated population density is 9.5 people/km².
Sources: U.S. Census Bureau Gazetteer Files · 2026 · U.S. Census Bureau Population Estimates Program · 2025.
Idaho ranks 11th of 51 by land area, 37th by population and 45th by calculated population density among the U.S. states and DC. Density uses the displayed population divided by land area converted to square kilometres.
- Land area
- 82,645 sq miU.S. Census Bureau Gazetteer Files · 2026
- Population
- 2,029,733U.S. Census Bureau Population Estimates Program · 2025
- Calculated density
- 9.5 people/km²Population ÷ land area in km²
Reading the figures
Idaho in the U.S. comparison set
Idaho has 82,645 sq mi of land area and a population estimate of 2,029,733 for 2025. In the 51-place state and DC set, it is 11th by land area, 37th by population, and 45th by calculated density.
Density is not a separately reported value here. It is calculated from the population and land area above, converted to square kilometres, so the result can be compared with supported country figures.
U.S. boundary outline: Census TIGER/Line 2025. The drawing is fitted to this profile panel; use a comparison page for a shared-area scale.