Share of the population by age and sex, five-year groups

Population of Idaho, 2010–2025 · click to pick a year
Estimates up to 2019 are built on the 2010 Census, those from 2020 on the 2020 Census. A line that steps up or down between 2019 and 2020 reflects this re-basing, not a sudden change in population.

Year

-5 -1   2023  +1 +5

1,970,497 people lived in Idaho on July 1, 2023: the 38th-largest population among the 50 states and the District of Columbia. The median age was 37.5 years (United States: 39.1); children (19.6%) and older adults (17.9%) make up similar shares of the population. There were 100.2 men for every 100 women. Since 2010 the population has grown by 25.4%. Source: U.S. Census Bureau, Population Estimates Program, Vintage 2025 estimates (resident population on July 1; public domain). Median age, shares, dependency ratios and rankings are calculated by PopulationPyramid.net from these estimates; the Census Bureau does not endorse this site.

Key indicators, 2023
Population
1,970,497
Rank by population
38th of 51
Median age
37.5
Men per 100 women
100.2
Under 15
19.6%
15–64
62.5%
65 and over
17.9%
Child dependency
31.3
Old-age dependency
28.7
Change since 2010
+25.4%
Dependency ratios count children under 15 or adults 65 and over per 100 residents aged 15 to 64.
Show the population by age group, 2023
AgeMenWomenTotalShare
0-458,70155,542114,2435.8%
5-966,69564,129130,8246.6%
10-1471,60768,704140,3117.1%
15-1973,62771,108144,7357.3%
20-2474,39967,466141,8657.2%
25-2964,05860,281124,3396.3%
30-3464,69061,847126,5376.4%
35-3963,41461,896125,3106.4%
40-4463,83162,807126,6386.4%
45-4956,38855,148111,5365.7%
50-5453,92353,922107,8455.5%
55-5952,22353,800106,0235.4%
60-6456,69760,265116,9625.9%
65-6954,29858,442112,7405.7%
70-7445,79549,42895,2234.8%
75-7933,15536,36369,5183.5%
80-8419,16522,61541,7802.1%
85+13,69820,37034,0681.7%
How Idaho compares with similar-sized states, 2023
RankStateResidentsRelative
35 Mississippi 2,942,470
36 New Mexico 2,119,349
37 Nebraska 1,988,172
38 Idaho 1,970,497
39 West Virginia 1,770,036
40 Hawaii 1,434,950
41 Maine 1,401,992
Frequently asked questions about Idaho's population
What is the population of Idaho?
Idaho had an estimated 1,970,497 residents on July 1, 2023, according to the U.S. Census Bureau, Population Estimates Program. That ranks 38th among the 51 states and the District of Columbia.
What is the median age in Idaho?
The median age in Idaho was 37.5 years in 2023, the 45th oldest of the 51 states and DC. That is 1.6 years younger than the national median of 39.1.
How many people in Idaho are 65 or older?
About 353,329 residents of Idaho (17.9%) were 65 or older in 2023, against 19.6% under 15 and 62.5% aged 15 to 64.
What does the population pyramid of Idaho show?
In 2023, Idaho: children (19.6%) and older adults (17.9%) make up similar shares of the population. There were 100.2 men for every 100 women.
How fast is the population of Idaho changing?
The population of Idaho grew by 25.4% between 2010 and 2023, and by 1.4% in the last year.
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