How many people live in ?

Updated annually
In 2025, there were 2.03 million people living in Idaho. That makes Idaho the 37th-most populous state, home to 0.59% of people living in the US.

2.03M

population of Idaho (2025)

0.59%

Idaho share of the US population (2025)
The population of Idaho was about 12.5 times higher than it was in 1900. Between 2024 and 2025, the population of Idaho grew by about 28,900 people.

About 2.03 million people lived in Idaho in 2025. That's about 12.5 times more than in 1900.

Annual population estimates

What are Idaho's age demographics?

About 354,400 Idaho residents were aged 65 and older in 2024. That represents 17.7% of the state’s population compared with 18% in the US overall.
Another 468,400 Idaho residents, or 23.4% of the state’s population, were aged under 18. For comparison, children account for 21.6% of the US population.

A lower share of Idaho's population is 65 and older than the US overall.

Population share by age group (2024)

What are Idaho's racial and ethnic demographics?

A state’s population may have racial and ethnic differences compared with the US overall. These figures reflect how people identified their race alone (not in combination with other races), and separate Hispanic or Latino ethnicity, following Census Bureau reporting standards.
Non-Hispanic white residents make up 79.6% of Idaho’s population, higher than the national share of 57.5%. Idaho also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (0.99%) than the US overall (0.72%).
In contrast, Idaho’s Hispanic population accounted for 14.3%, below the 20% share nationwide. The non-Hispanic Black or African American population makes up 0.91% of the state, compared with 12.6% nationally.

A higher share of Idaho's population is non-Hispanic white than the US overall.

Population share by race and ethnicity (2024)

What are Idaho's most populous counties?

In 2024, four out of 44 counties accounted for over half of Idaho's population:
  • Ada County, 535,800 (26.8% of the population)
  • Canyon County, 266,900 (13.3%)
  • Kootenai County, 188,300 (9.4%)
  • Bonneville County, 133,600 (6.7%)

In 2024, Ada County was the most populous county in Idaho.

Population estimates

What are Idaho's most populous cities?

The largest city in Idaho is Boise City with about 238,000 residents in 2024.

Cities and counties in Idaho ranked by population

Cities and counties in Idaho ranked by population
1.

Boise City

237,963
2.

Meridian 

139,740
3.

Nampa 

117,350
4.

Caldwell 

73,088
5.

Idaho Falls

69,523
6.

Pocatello 

58,231
7.

Coeur d'Alene

57,355
8.

Twin Falls

55,589
9.

Post Falls

45,800
10.

Rexburg 

40,695

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Methodology

USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.

The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.

Page sources

USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.