CensusEasy
COUNTY · 2000 CENSUS

Jefferson County

Idaho · 19,155 residents · 1,093.681 sq mi
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The short version

Jefferson County has lower-than-average household income, with a median household income of $37,737. Population has grown 16% since 1990. 15% of adults hold a bachelor's degree or higher, below the national rate of 24%. Median home value has risen by half since 1990, reaching $89,400. At a median age of 28.8, residents skew younger than the country as a whole.

At a glance
Lower income
below the US median
US median: $42,589
Younger
median age 28.8
US median: 35.2
Less educated
15% hold a bachelor's degree
US average: 24%
Less affordable
home values up 25%, inflation adjusted
US median home: $120,530
Section 01

Population & growth

Total population
19,155
+16%since 1990
from 16,543 in 1990
1990 – 2025
Median age
28.8
+9%since 1990
from 26.4 in 1990
US average: 35.2
Population, 1990 – 2024
15K20K25K30K35K1990201020202024Jefferson County
202433K
1990201020202024
Age distribution, 2000
Under 58.9%(1,711)
US avg: 6.8%
5 to 99.9%(1,893)
US avg: 7.3%
10 to 1410.7%(2,058)
US avg: 7.3%
15 to 1910.2%(1,948)
US avg: 7.2%
20 to 246.2%(1,182)
US avg: 6.7%
25 to 3411%(2,116)
US avg: 14.2%
35 to 4414.5%(2,770)
US avg: 16%
45 to 5411.8%(2,257)
US avg: 13.4%
55 to 647.5%(1,445)
US avg: 8.6%
65 to 745.1%(972)
US avg: 6.5%
75 to 843.3%(632)
US avg: 4.4%
85 and over0.9%(171)
US avg: 1.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$37,737
+17%inflation adjusted, since 1990
from $24,421 in 1990
US average: $42,589
1990 – 2024
Per capita income
$13,838
+53%since 1990
from $9,055 in 1990
US average: $21,522
Poverty rate
10.4%
−3.9 ptssince 1990
from 14.3% in 1990
US average: 12.4%
Section 03

Housing

Median home value
$89,400
+25%inflation adjusted, since 1990
from $54,200 in 1990
US average: $120,530
1990 – 2024
Median gross rent
$433
+5%inflation adjusted, since 1990
from $314 in 1990
US average: $602
Owner-occupied
84.9%
+4.4 ptssince 1990
from 80.5% in 1990
15.1% rent
RELATED:See current rent listings in Jefferson County on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic94.3%(15,594)
Black0%(4)
Hispanic / Latino5.8%(966)
Asian0.3%(55)
2000
White, non-Hispanic88.5%(16,955)
Black0.1%(21)
Hispanic / Latino10%(1,907)
Asian0.2%(43)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin
Mexican8.6%(2,840)
Chilean0.4%(122)
Venezuelan0.3%(93)
Guatemalan0.2%(82)
Ecuadorian0.2%(82)
Puerto Rican0.2%(76)
Spaniard0.2%(75)
Peruvian0.1%(30)
Cuban0%(1)
Asian origin
Korean0.1%(28)
Chinese0%(4)
Pacific Islander origin
Chamorro0.1%(24)
Samoan0%(6)
Tongan0%(4)
Ancestry
English32.7%(10,838)
German12.7%(4,213)
American5.5%(1,832)
Irish5%(1,668)
Scottish5%(1,653)
French2.5%(817)
Italian2.3%(766)
Norwegian2.3%(757)
Swiss2.2%(719)
Dutch2.1%(687)
Swedish2%(665)
Danish2%(654)
+ 19 more ancestry groups with data
Welsh1.8%(601)
Polish0.6%(196)
Hungarian0.5%(173)
British0.4%(128)
Russian0.2%(66)
Greek0.2%(61)
Austrian0.1%(39)
Canadian0.1%(31)
Finnish0.1%(23)
Portuguese0.1%(22)
Czech0.1%(18)
Belgian0%(11)
Slovak0%(10)
Arab0%(9)
RANKED:Largest English population · Largest German population · Largest Mexican population · Largest American population · Largest Irish population
Section 05

Education

Bachelor's degree or higher
15.2%
+3.5 ptssince 1990
from 11.8% in 1990
US average: 24.4%
High school or higher
84.4%
+6.8 ptssince 1990
from 77.6% in 1990
US average: 80.3%
Graduate degree
3.7%
+0.2 ptssince 1990
from 3.5% in 1990
US average: 8.8%
Section 06

Commute & transportation

Average commute
16.7 min
−32%since 1990
from 24.5 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status
Men 15+
Never married25.1%(1,703)
Married66.9%(4,535)
Widowed1.1%(73)
Divorced6.9%(465)
Women 15+
Never married19%(1,274)
Married67.4%(4,506)
Widowed7.7%(516)
Divorced5.9%(393)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
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+59%
Home value$414,800+364%
Population55,172+56%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Clark County
Income$55,208+46%
Home value$216,900+143%
Population783−98%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Bingham County
Income$77,878+106%
Home value$293,300+228%
Population51,153+45%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Butte County
Income$53,015+40%
Home value$217,600+143%
Population2,783−92%
SEE FULL COMPARISON →
Frequently asked

How many people live in Jefferson County, Idaho?

Jefferson County, Idaho has about 19,155 residents according to the 2000 Census.

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

The typical household in Jefferson County, Idaho earns about $37,737 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 $89,400, and the typical rent is about $433 a month.

How educated are people in Jefferson County, Idaho?

About 15.2% 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 10.4% 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 2,612 residents, a change of about 16 percent over that period.

Keep going

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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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →