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COUNTY · 1990 CENSUS

Jefferson County

Iowa · 16,310 residents · 435.524 sq mi
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The short version

Jefferson County has lower-than-average household income, with a median household income of $22,630. Population has held roughly steady since 2000. Median home value is $46,800. 26% of adults hold a bachelor's degree, well above the US average, yet household income trails the national figure — a profile common to graduate-student tracts and academic hubs.

At a glance
Lower income
below the US median
US median: $30,130
Older
median age 36.9
US median: 33.0
More educated
26% hold a bachelor's degree
US average: 20%
More affordable
home values down 15%, inflation adjusted
US median home: $93,722
Section 01

Population & growth

16,310
+1%vs 2000
vs 16,181 in 2000
1990 – 2025
37 / sq mi
+1%vs 2000
vs 37 / sq mi in 2000
US average: 221
36.9
−10%vs 2000
vs 41.1 in 2000
US average: 33.0
Population, 19902024
15K16K17K18K18K1990201020202024Jefferson County
202416K
1990201020202024
Section 02

Income & economy

$22,630
−12%inflation adjusted, since 2000
vs $33,851 in 2000
US average: $30,130
1990 – 2024
$11,664
−40%vs 2000
vs $19,579 in 2000
US average: $14,340
13.9%
+2.9 ptsvs 2000
vs 10.9% in 2000
US average: 13.2%
Section 03

Housing

$46,800
−15%inflation adjusted, since 2000
vs $72,700 in 2000
US average: $93,722
1990 – 2024
$339
+5%inflation adjusted, since 2000
vs $426 in 2000
US average: $450
66.7%
−0.6 ptsvs 2000
vs 67.2% in 2000
33.3% rent
2.1
−4%vs 2000
vs 2.1 in 2000
1990 – 2024
RELATED:See current rent listings in Jefferson County on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic94.7%(15,329)
Black0.6%(102)
Hispanic / Latino1.8%(297)
Asian1.7%(275)
Other0%
Diversity Score10.2%(1,654)
1990
White, non-Hispanic98.4%(16,048)
Black0.6%(106)
Hispanic / Latino0.9%(144)
Asian0.6%(93)
Other0.4%(63)
Diversity Score6.1%(990)
6
−41%vs 2000
vs 10 in 2000
1990 – 2024
Section 05

Education

26.5%
−4.8 ptsvs 2000
vs 31.2% in 2000
US average: 20.3%
High school or higher
82.3%
−5.8 ptsvs 2000
vs 88.1% in 2000
US average: 75.2%
11.2%
−0.7 ptsvs 2000
vs 11.9% in 2000
US average: 7.1%
Section 06

Commute & transportation

21.2 min
+96%vs 2000
vs 10.8 min in 2000
US average: 21.9
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

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Frequently asked

How many people live in Jefferson County, Iowa?

Jefferson County, Iowa has about 16,310 residents according to the 1990 Census.

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

The typical household in Jefferson County, Iowa earns about $22,630 a year. Half of households make more than that, and half make less.

Is Jefferson County, Iowa expensive?

In Jefferson County, Iowa, the median home is worth about $46,800, and the typical rent is about $339 a month.

How educated are people in Jefferson County, Iowa?

About 26.5% of adults age 25 and over in Jefferson County, Iowa hold a bachelor's degree or higher.

What is the poverty rate in Jefferson County, Iowa?

About 13.9% of people in Jefferson County, Iowa live below the federal poverty line.

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

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