Jefferson County, Idaho's estimated 2024 population is 35,060 with a growth rate of 2.52% in the past year according to the most recent United States census data. Jefferson County, Idaho is the 12th largest county in Idaho. The 2010 population was 26,222 and has seen a growth of 33.7% since that time.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2029 | 39,370 | 862 | 2.24% |
| 2028 | 38,508 | 862 | 2.29% |
| 2027 | 37,646 | 862 | 2.34% |
| 2026 | 36,784 | 862 | 2.4% |
| 2025 | 35,922 | 862 | 2.46% |
| 2024 | 35,060 | 862 | 2.52% |
| 2023 | 34,198 | 862 | 2.59% |
| 2022 | 33,336 | 1,135 | 3.52% |
| 2021 | 32,201 | 1,121 | 3.61% |
| 2020 | 31,080 | 1,162 | 3.88% |
| 2019 | 29,918 | 500 | 1.7% |
| 2018 | 29,418 | 970 | 3.41% |
| 2017 | 28,448 | 621 | 2.23% |
| 2016 | 27,827 | 694 | 2.56% |
| 2015 | 27,133 | 185 | 0.69% |
| 2014 | 26,948 | 139 | 0.52% |
| 2013 | 26,809 | 167 | 0.63% |
| 2012 | 26,642 | 327 | 1.24% |
| 2011 | 26,315 | 93 | 0.35% |
| 2010 | 26,222 | 0 | 0% |
| 1990 | 16,543 | 1,239 | 8.1% |
| 1980 | 15,304 | 3,685 | 31.72% |
| 1970 | 11,619 | -53 | -0.45% |
| 1960 | 11,672 | 1,177 | 11.21% |
| 1950 | 10,495 | -267 | -2.48% |
| 1940 | 10,762 | 1,591 | 17.35% |
| 1930 | 9,171 | -270 | -2.86% |
| 1920 | 9,441 | -29,929 | -76.02% |
White
Two or more races
Other race
Native American
Asian
Black or African American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 9,623 | 3.25 | 82.4 | 17.6 |
| Married | 6,826 | 3.82 | 86.9 | 13.1 |
| Non Family | 1,927 | 1.21 | 68.7 | 31.3 |
| Female | 624 | 3.25 | 75.6 | 24.4 |
| Male | 246 | 3.41 | 79.7 | 20.3 |
3.71
Average Family Size
3.25
Average Household Size
82.4%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among black people with a rate of 100%.
The highest rate of bachelors degrees is among native american people with a rate of 47.76%.
All
Male
Female
$43,246
Average Earnings
$58,924
Average Male
$27,912
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
87.81% of Jefferson County, Idaho residents speak only English, while 12.19% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 10.51% of the population.
rate
8.92%
Overall Poverty Rate
8.31%
Male Poverty Rate
9.56%
Female Poverty Rate
The race most likely to be in poverty in Jefferson County, Idaho is Other, with 33.63% below the poverty level.
The race least likely to be in poverty in Jefferson County, Idaho is Multiple, with 4.47% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 3.78%. Among those working part-time, it was 8.26%, and for those that did not work, the poverty rate was 13.37%.
Married
Widowed
Divorced
Separated
NeverMarried
62.6%
Overall Marriage Rate
63.3%
Male Marriage Rate
61.9%
Female Marriage Rate
male
female
The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
4.38%
Veteran Poverty Rate
42.27%
Veteran Disability Rate
LaborForceParticipation
66.4%
Labor Force Participation
64.8%
Employment Rate
2.4%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
65.84%
Born in Jefferson County, Idaho
95.84%
Native Born
4.16%
Foreign Born
2.41%
Non Citizen
1.75%
Naturalized
95.84% of Jefferson County, Idaho residents were born in the United States, with 65.84% having been born in Idaho. 2.41% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.