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COUNTY · 2020 ACS

Jefferson County

Idaho · 30,891 residents · 1,093.681 sq mi
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The short version

Jefferson County has roughly average household income, with a median household income of $65,577. The county has grown rapidly, with population up 61% since 2000. Median home value has more than doubled since 2000, reaching $223,900. At a median age of 32.1, residents skew younger than the country as a whole.

At a glance
Average income
near the US median
US median: $66,278
Younger
median age 32.1
US median: 38.8
Less educated
25% hold a bachelor's degree
US average: 33%
Less affordable
home values up 67%, inflation adjusted
US median home: $265,253
Section 01

Population & growth

Total population
30,891
+61%since 2000
from 19,155 in 2000
1990 – 2025
Median age
32.1
+11%since 2000
from 28.8 in 2000
US average: 38.8
Population, 1990 – 2024
15K20K25K30K35K1990201020202024Jefferson County
202433K
1990201020202024
Age distribution, 2020
Under 57.9%(2,454)
US avg: 5.6%
5 to 99.6%(2,966)
US avg: 6.1%
10 to 1410.6%(3,270)
US avg: 6.5%
15 to 198.9%(2,762)
US avg: 6.6%
20 to 245.4%(1,658)
US avg: 6.7%
25 to 3411%(3,389)
US avg: 13.5%
35 to 4413.7%(4,220)
US avg: 12.7%
45 to 5410.2%(3,152)
US avg: 12.3%
55 to 6410.6%(3,289)
US avg: 13.1%
65 to 747.8%(2,399)
US avg: 10%
75 to 843.3%(1,031)
US avg: 4.9%
85 and over1%(301)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$65,577
+16%inflation adjusted, since 2000
from $37,737 in 2000
US average: $66,278
1990 – 2024
Per capita income
$25,639
+85%since 2000
from $13,838 in 2000
US average: $35,364
Households earning $100K+
43.2%
+17.0 ptssince 2009
from 26.3% in 2009
US average: 43.9%
Poverty rate
8.2%
−2.2 ptssince 2000
from 10.4% in 2000
US average: 12.8%
Workforce by industry, 2020
Information13.1%
US avg: 11.1%
Agriculture, forestry, fishing9.5%
US avg: 1.7%
Wholesale trade9.4%
US avg: 6.7%
Construction9.2%
US avg: 1.2%
Retail trade7.7%
US avg: 10%
Finance & insurance5.8%
US avg: 5.5%
Other services5.5%
US avg: 6.6%
Professional, scientific, technical4.8%
US avg: 4.7%
Public administration3.9%
US avg: 4.7%
Transportation & warehousing2.5%
US avg: 2.5%
Arts, entertainment, food1.4%
US avg: 2%
Education & health services1.1%
US avg: 0.8%
Manufacturing0.3%
US avg: 0.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$223,900
+67%inflation adjusted, since 2000
from $89,400 in 2000
US average: $265,253
1990 – 2024
Median gross rent
$853
+31%inflation adjusted, since 2000
from $433 in 2000
US average: $1,124
Owner-occupied
82.7%
−2.2 ptssince 2000
from 84.9% in 2000
17.3% rent
Afford Score
3.4
+18%since 2009
from 2.9 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
RELATED:See current rent listings in Jefferson County on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic88.5%(16,955)
Black0.1%(21)
Hispanic / Latino10%(1,907)
Asian0.2%(43)
Other0%
2020
White, non-Hispanic85.6%(26,430)
Black0.2%(73)
Hispanic / Latino10.5%(3,256)
Asian0.4%(118)
Other2.3%(725)
Segregation Score
22
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican9.4%(2,750)
Spaniard0.6%(178)
Argentine0.2%(44)
Asian origin
Japanese0.2%(73)
Chinese0.2%(48)
Filipino0.1%(23)
Pacific Islander origin
Chamorro0.1%(39)
Samoan0.1%(30)
Ancestry
English26.5%(7,754)
German13.7%(4,010)
American10.2%(2,975)
Irish5.5%(1,600)
Swedish4%(1,167)
Scottish3.4%(999)
Swiss2.7%(802)
Norwegian2.7%(790)
Dutch2.7%(789)
Welsh2.4%(705)
Italian1.9%(546)
Danish1.8%(540)
+ 16 more ancestry groups with data
French1.3%(382)
Scotch-Irish0.9%(256)
British0.7%(216)
Ukrainian0.7%(199)
Hungarian0.4%(119)
Polish0.3%(92)
Portuguese0.2%(55)
Russian0.2%(49)
Greek0.2%(44)
Czech0.1%(33)
Canadian0.1%(19)
Croatian0.1%(16)
Serbian0%(7)
Finnish0%(5)
RANKED:Largest English population · Largest German population · Largest American population · Largest Mexican population · Largest Irish population
Section 05

Education

Bachelor's degree or higher
25.2%
+9.9 ptssince 2000
from 15.2% in 2000
US average: 32.9%
High school or higher
91.2%
+6.8 ptssince 2000
from 84.4% in 2000
US average: 88.5%
Graduate degree
8.0%
+4.3 ptssince 2000
from 3.7% in 2000
US average: 12.7%
Section 06

Commute & transportation

Average commute
22.7 min
+36%since 2000
from 16.7 min in 2000
US average: 26.9
Drive alone to work
75.7%
+1.1 ptssince 2009
from 74.6% in 2009
US average: 75.1%
No vehicle available
1.2%
−2.0 ptssince 2009
from 3.2% in 2009
US average: 8.4%
Section 07

Work & employment

Unemployment rate
3.4%
−2.4 ptssince 2011
from 5.8% in 2011
US average: 5.4%
Labor force participation
67.6%
+0.2 ptssince 2011
from 67.4% in 2011
US average: 63.4%
Management & professional
37.7%
−20.3 ptssince 2009
from 58.0% in 2009
US average: 39.3%
Section 08

People & community

Male
50.7%
+0.1 ptssince 2009
from 50.6% in 2009
Female
49.3%
−0.1 ptssince 2009
from 49.4% in 2009
Foreign born
3.6%
−1.3 ptssince 2009
from 4.9% in 2009
US average: 13.5%
Uninsured
8.9%
−76.4 ptssince 2013
from 85.3% in 2013
US average: 8.8%
Marital status (2024)
Men 15+
Never married26.7%(3,343)
Married64.6%(8,102)
Widowed1.1%(141)
Divorced7.6%(958)
Women 15+
Never married20.7%(2,478)
Married63.4%(7,575)
Widowed6%(717)
Divorced9.9%(1,187)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Drill deeper

Places similar to Jefferson County

Clinton County
Pop 37,128
Lee County
Pop 34,179
Dawson County
Pop 35,365
Effingham County
Pop 34,519
Places similar to Jefferson County
Head to head

Compare Jefferson County to nearby counties

JEFFERSON COUNTY VS
Madison County
Income$60,160−8%
Home value$414,800+85%
Population55,172+56%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Clark County
Income$55,208−16%
Home value$216,900−3%
Population783−98%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Bingham County
Income$77,878+19%
Home value$293,300+31%
Population51,153+45%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Butte County
Income$53,015−19%
Home value$217,600−3%
Population2,783−92%
SEE FULL COMPARISON →
Frequently asked

How many people live in Jefferson County, Idaho?

Jefferson County, Idaho has about 30,891 residents according to the 2020 American Community Survey.

What is the median household income in Jefferson County, Idaho?

The typical household in Jefferson County, Idaho earns about $65,577 a year. Half of households make more than that, and half make less.

Is Jefferson County, Idaho expensive?

In Jefferson County, Idaho, the median home is worth about $223,900, and the typical rent is about $853 a month.

How educated are people in Jefferson County, Idaho?

About 25.2% of adults age 25 and over in Jefferson County, Idaho hold a bachelor's degree or higher.

What is the poverty rate in Jefferson County, Idaho?

About 8.2% of people in Jefferson County, Idaho live below the federal poverty line.

Has Jefferson County, Idaho grown since 1990?

Yes, Jefferson County, Idaho has grown since 1990. The population has added about 14,348 residents, a change of about 87 percent over that period.

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Explore from here

6 census tracts
Census Tract 9604.02Census Tract 9604.01Census Tract 9603.02Census Tract 9602Census Tract 9601Census Tract 9603.01
7 ZIP codes
ZIP 83442ZIP 83434ZIP 83444ZIP 83450ZIP 83431ZIP 83425ZIP 83435
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Rankings
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →