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Jefferson County, Idaho

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Indicators

Population and growth

MeasureJefferson CountyIdahoData periodSource
PopulationPeopleIdaho: 2,029,7332025 (estimate) · Census Bureau35,2972,029,7332025 (estimate)Census Bureau
Population densityPeople per square mileIdaho: 24.62025 (estimate) · Census Bureau32.324.62025 (estimate)Census Bureau
Population growth ratePercentIdaho: 1.4%2025 (estimate) · Census Bureau1.3%1.4%2025 (estimate)Census Bureau
Domestic migrationPeopleIdaho: 19,9152025 (estimate) · Census Bureau22419,9152025 (estimate)Census Bureau
Decennial census populationPeopleIdaho: 1,839,1062020 · Census Bureau30,8911,839,1062020Census Bureau
Population by race and Hispanic originPeopleIdaho: n/a2020–2024 (estimate) · Census Bureau28,414n/a2020–2024 (estimate)Census Bureau
Median ageYearsIdaho: 37.32020–2024 (estimate) · Census Bureau32.837.32020–2024 (estimate)Census Bureau

Housing and cost of living

MeasureJefferson CountyIdahoData periodSource
Median home valueDollarsIdaho: $418,6002020–2024 (estimate) · Census Bureau$408,400$418,6002020–2024 (estimate)Census Bureau
Median gross rentDollarsIdaho: $1,2382020–2024 (estimate) · Census Bureau$1,138$1,2382020–2024 (estimate)Census Bureau
Renters paying 30%+ of income on rentPercentIdaho: 46.9%2020–2024 (estimate) · Census Bureau28.3%46.9%2020–2024 (estimate)Census Bureau
Housing units authorized by building permitsCountIdaho: 17,9442025 (estimate) · Census Bureau31217,9442025 (estimate)Census Bureau
Subsidized housing units availableCountIdaho: 12,9422025 · HUD4712,9422025HUD

Jobs, wages and economy

MeasureJefferson CountyIdahoData periodSource
Median household incomeDollarsIdaho: $77,8002020–2024 (estimate) · Census Bureau$86,679$77,8002020–2024 (estimate)Census Bureau
Unemployment ratePercentIdaho: 3.7%2025 (estimate) · BLS2.9%3.7%2025 (estimate)BLS
Average annual wageDollarsIdaho: $62,3922025 · BLS$44,405$62,3922025BLS
Covered employmentPeopleIdaho: 874,2832025 · BLS8,326874,2832025BLS
Business establishmentsCountIdaho: 58,1002023 · Census Bureau73958,1002023Census Bureau
Poverty ratePercentIdaho: 10.6%2020–2024 (estimate) · Census Bureau9.7%10.6%2020–2024 (estimate)Census Bureau

Taxes, spending and government

MeasureJefferson CountyIdahoData periodSource
Average property tax rate by countyPercentIdaho: 0.680%2025 · Idaho Tax Commission0.706%0.680%2025Idaho Tax Commission
Ballots castCountIdaho: 917,4692024 · Idaho SOS16,016917,4692024Idaho SOS
Registered votersPeopleIdaho: 1,030,522September 2026 · Idaho SOS17,4171,030,522September 2026Idaho SOS

Education

MeasureJefferson CountyIdahoData periodSource
Public school enrollment by countyPeopleIdaho: n/a2024 · Idaho SDE6,643n/a2024Idaho SDE

Healthcare

MeasureJefferson CountyIdahoData periodSource
BirthsPeopleIdaho: 23,6952025 (estimate) · Census Bureau42123,6952025 (estimate)Census Bureau
Uninsured ratePercentIdaho: 9.1%2020–2024 (estimate) · Census Bureau7.8%9.1%2020–2024 (estimate)Census Bureau

Crime and public safety

MeasureJefferson CountyIdahoData periodSource
Group A offense ratePer 100,000 residentsIdaho: 3,166.522025 (preliminary) · Idaho State Police1,481.003,166.522025 (preliminary)Idaho State Police

Water

MeasureJefferson CountyIdahoData periodSource
Drought Severity and Coverage IndexIndexIdaho: 245October 6, 2026 · NDMC394245October 6, 2026NDMC
Irrigated landAcresIdaho: 3,167,4992022 · USDA NASS143,4483,167,4992022USDA NASS
Total water withdrawalsAcre-feetIdaho: 19,868,1562015 (estimate) · USGS702,09419,868,1562015 (estimate)USGS
Livestock water withdrawalsAcre-feetIdaho: 61,4802022 (estimate) · USGS1,66361,4802022 (estimate)USGS
Industrial water withdrawalsAcre-feetIdaho: 14,2422020 (estimate) · USGS58414,2422020 (estimate)USGS

Public lands, agriculture and wildfire

MeasureJefferson CountyIdahoData periodSource
FarmsCountIdaho: 22,8772022 · USDA NASS67922,8772022USDA NASS
Land in farmsAcresIdaho: 11,547,9632022 · USDA NASS262,18011,547,9632022USDA NASS
Market value of agricultural products soldDollarsIdaho: $10,892,201,0002022 · USDA NASS$380,801,000$10,892,201,0002022USDA NASS
Potato productionHundredweight (cwt)Idaho: 128,760,0002011 (estimate) · USDA NASS11,260,000128,760,0002011 (estimate)USDA NASS
Barley productionBushelsIdaho: 54,880,0002025 (estimate) · USDA NASS6,106,00054,880,0002025 (estimate)USDA NASS
Wildfires by countyCountIdaho: 1,5192025 · NIFC81,5192025NIFC

Transportation and infrastructure

MeasureJefferson CountyIdahoData periodSource
Traffic deathsCountIdaho: 2382024 · NHTSA12382024NHTSA
Mean travel time to workMinutesIdaho: 21.62020–2024 (estimate) · Census Bureau25.121.62020–2024 (estimate)Census Bureau
County-maintained road milesMilesIdaho: 28,011.7512018 · ITD745.88828,011.7512018ITD

Compare every Idaho county side by side

Ada CountyAdams CountyBannock CountyBear Lake CountyBenewah CountyBingham CountyBlaine CountyBoise CountyBonner CountyBonneville CountyBoundary CountyButte CountyCamas CountyCanyon CountyCaribou CountyCassia CountyClark CountyClearwater CountyCuster CountyElmore CountyFranklin CountyFremont CountyGem CountyGooding CountyIdaho CountyJefferson CountyJerome CountyKootenai CountyLatah CountyLemhi CountyLewis CountyLincoln CountyMadison CountyMinidoka CountyNez Perce CountyOneida CountyOwyhee CountyPayette CountyPower CountyShoshone CountyTeton CountyTwin Falls CountyValley CountyWashington County
Jefferson County among Idaho’s 44 counties. Each county links to its page.

County facts

County seat
Rigby
Established
Land area
1,093.681 sq mi, 32.3 per sq mi (2025)
Website
www.co.jefferson.id.us

Source: Idaho Secretary of State, Blue Book of Idaho, 2025-2026.

Source: U.S. Census Bureau, Gazetteer Files, 2025 and 2026 (counties and states). Published .

Population

Population, Jefferson County, 2010 to 2025Population, Jefferson County, 2010 to 2025. Jefferson County: 26,223 in 2010, 35,297 in 2025.010k20k30k40k20102020JeffersonCountyPeoplePopulation, Jefferson County, 2010 to 2025Population, Jefferson County, 2010 to 2025. Jefferson County: 26,223 in 2010, 35,297 in 2025.010k20k30k40k2010201520202025JeffersonCountyPeoplePopulation, Jefferson County, 2010 to 2025Population, Jefferson County, 2010 to 2025. Jefferson County: 26,223 in 2010, 35,297 in 2025.010k20k30k40k2010201520202025Jefferson CountyPeople

Source: U.S. Census Bureau, Population Estimates Program. Published .

Data table (16 rows)
PeriodJefferson County (people)
201026,223
201126,313
201226,641
201326,804
201426,944
201527,127
201627,830
201728,439
201829,405
201929,871
202031,080
202132,207
202233,358
202334,296
202434,856
202535,297

Unemployment rate

Unemployment rate, Jefferson County, 1990 to 2025Unemployment rate, Jefferson County, 1990 to 2025. Jefferson County: 5.1% in 1990, 2.9% in 2025.0.0%2.0%4.0%6.0%8.0%20002020JeffersonCountyPercentUnemployment rate, Jefferson County, 1990 to 2025Unemployment rate, Jefferson County, 1990 to 2025. Jefferson County: 5.1% in 1990, 2.9% in 2025.0.0%2.0%4.0%6.0%8.0%1990200020102020JeffersonCountyPercentUnemployment rate, Jefferson County, 1990 to 2025Unemployment rate, Jefferson County, 1990 to 2025. Jefferson County: 5.1% in 1990, 2.9% in 2025.0.0%2.0%4.0%6.0%8.0%1990200020102020Jefferson CountyPercent

Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics. Published .

Data table (36 rows)
PeriodJefferson County (percent)
19905.1%
19915.5%
19926.1%
19935.3%
19945.4%
19955.2%
19964.9%
19974.3%
19984.4%
19994.3%
20003.7%
20013.9%
20024.1%
20033.9%
20043.8%
20053.3%
20063.0%
20072.4%
20083.7%
20097.3%
20107.1%
20117.0%
20126.4%
20135.8%
20143.7%
20153.2%
20162.9%
20172.4%
20182.2%
20192.2%
20203.4%
20212.6%
20222.3%
20232.5%
20242.9%
20252.9%

Average annual wage

Average annual wage, Jefferson County, 2001 to 2025Average annual wage, Jefferson County, 2001 to 2025. Jefferson County: $19,678 in 2001, $44,405 in 2025.$0$20k$40k$60k20102020JeffersonCountyDollarsAverage annual wage, Jefferson County, 2001 to 2025Average annual wage, Jefferson County, 2001 to 2025. Jefferson County: $19,678 in 2001, $44,405 in 2025.$0$20k$40k$60k20102020JeffersonCountyDollarsAverage annual wage, Jefferson County, 2001 to 2025Average annual wage, Jefferson County, 2001 to 2025. Jefferson County: $19,678 in 2001, $44,405 in 2025.$0$20k$40k$60k20052010201520202025Jefferson CountyDollars

Source: U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages, annual averages. Published .

Data table (25 rows)
PeriodJefferson County (dollars)
2001$19,678
2002$20,996
2003$21,755
2004$21,900
2005$22,119
2006$22,573
2007$24,070
2008$24,894
2009$25,063
2010$25,092
2011$26,150
2012$26,714
2013$27,495
2014$28,037
2015$29,530
2016$30,616
2017$31,661
2018$32,931
2019$33,477
2020$35,008
2021$37,852
2022$41,374
2023$41,895
2024$46,365
2025$44,405

County officials

OfficeNameParty
Commissioner, District 1Shayne YoungR
Commissioner, District 2Scott HancockR
Commissioner, District 3Roger ClarkR
AssessorJessica RoachR
ClerkColleen Casper PooleR
CoronerLaVar SummersR
ProsecutorPaul ButikoferR
SheriffSteve AndersonR
TreasurerKristine LundR

Source: Idaho Secretary of State, Blue Book of Idaho, 2025-2026.

Representation

Legislative district

DistrictSenatorRepresentative, Seat ARepresentative, Seat B
31Van T. Burtenshaw (R)Jerald Raymond (R)Rod Furniss (R)

Congress

Congressional District 2
Michael K. Simpson (R)
U.S. Senate
James E. Risch (R); Mike Crapo (R)

Source: Idaho Legislature, Reapportionment plans L03 and C03, 2021. Published .

Source: Idaho Legislature, Senate and House membership.

Source: Clerk of the U.S. House of Representatives, Member lists of the House and Senate. Published .

This page was last updated .