Overview
30,427
Total Population
31.9
Median age
49.27%
Female population %
103:100
Gender ratio (M:F)
10-14 years
Largest age group
64.8
Total dependency ratio
White
Largest racial group
3,235
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Jefferson County's population is young compared to the rest of the country:
- The median age in Jefferson County is 31.9, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Jefferson County's population under 18 was 33.98%, compared to the 22.51% nationwide.
- Jefferson County's elderly or the senior population (over 65 age) was 11.14% as compared to 16.04% nationwide.
- Of the total population in Jefferson County, 28.17% were under the age of 15, 19.74% aged 15 to 29, 40.95% aged 30 to 64, 10.10% aged 65 to 84, and 1.05% were 85 years of age and older.
Read more about Jefferson County, ID population by age ➔
Gender
There are 443 less females than males in Jefferson County:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.27% females and 50.73% males in Jefferson County, ID.
- The Jefferson County, ID gender ratio is 103:100 i.e. 103 men to 100 women (1.030).
- For male population, the largest age group is 10-14 years with a population of 1,638.
- For the female population, the largest age group is 10-14 years with a population of 1,671.
Read more about Jefferson County, ID population by gender ➔
Race / Ethnicity
Jefferson County's population has become increasingly diverse:
- Racial distribution of Jefferson County population: 89.06% are White, 0.07% are Black or African American, 0.79% are American Indian and Alaska Native, 0.29% are Asian, 4.90% are some other race and 4.89% are multiracial.
- Jefferson County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
- By ethnicity, 3,235 is Hispanic or Latino (of any race), and 27,192 (89.37% of the total population) is Non-Hispanic.
- The largest racial group in Jefferson County is White with a population of 27,098 (89.06% of the total population).
Read more about Jefferson County, ID population by race ➔
Year by year
Jefferson County's population has not reached its peak yet and is showing a trend of further growth:
- The peak population was 33,428 in the year 2022
- From 2000 to 2010, Jefferson County's population increased by 7,061 (36.85%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Jefferson County's population increased by 4,855 (18.51%), 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, Jefferson County's population was lowest in year 2000 at 19,161.
Read more about Jefferson 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)