Overview
16,494
Total Population
50.1
Median age
47.08%
Female population %
112.4:100
Gender ratio (M:F)
65-69 years
Largest age group
77.3
Total dependency ratio
White
Largest racial group
59
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Idaho County's population is old compared to the rest of the country:
- The median age in Idaho County is 50.1, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Idaho County's population under 18 was 19.57%, compared to the 22.51% nationwide.
- Idaho County's elderly or the senior population (over 65 age) was 27.77% as compared to 16.04% nationwide.
- Of the total population in Idaho County, 15.84% were under the age of 15, 14.93% aged 15 to 29, 41.47% aged 30 to 64, 25.49% aged 65 to 84, and 2.28% were 85 years of age and older.

Read more about Idaho County, ID population by age ➔
Gender
There are 964 less females than males in Idaho County:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 47.08% females and 52.92% males in Idaho County, ID.
- The Idaho County, ID gender ratio is 112.4:100 i.e. 112.4 men to 100 women (1.124).
- For male population, the largest age group is 65-69 years with a population of 818.
- For the female population, the largest age group is 55-59 years with a population of 743.

Read more about Idaho County, ID population by gender ➔
Race / Ethnicity
Idaho County's population has become increasingly diverse:
- Racial distribution of Idaho County population: 92.79% are White, 0.13% are Black or African American, 3.40% are American Indian and Alaska Native, 0.48% are Asian, 0.02% are Native Hawaiian and other Pacific Islander, 0.71% are some other race and 2.46% are multiracial.
- Idaho County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
- By ethnicity, 59 is Hispanic or Latino (of any race), and 15,904 (96.42% of the total population) is Non-Hispanic.
- The largest racial group in Idaho County is White with a population of 15,305 (92.79% of the total population).

Read more about Idaho County, ID population by race ➔
Year by year
Idaho County's population has not reached its peak yet and is showing a trend of further growth:
- The peak population was 17,593 in the year 2022
- From 2000 to 2010, Idaho County's population increased by 854 (5.53%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Idaho County's population increased by 277 (1.70%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
- Between the year 2000 and 2022, Idaho County's population was lowest in year 2003 at 15,251.

Read more about Idaho County, ID population by year ➔
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
- U.S. Census Bureau Population Estimates Population Estimates Program (PEP)