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COUNTY · 2000 CENSUS

Jefferson County

Iowa · 16,181 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 $33,851. Population has held roughly steady since 1990. Median home value has risen by half since 1990, reaching $72,700. With a median age of 41.1, the population is older than the US median of 35.2.

At a glance
Lower income
below the US median
US median: $42,589
Older
median age 41.1
US median: 35.2
More educated
31% hold a bachelor's degree
US average: 24%
Stable housing
home values roughly flat, inflation adjusted
US median home: $120,530
Section 01

Population & growth

16,181
−1%since 1990
from 16,310 in 1990
1990 – 2025
37 / sq mi
−1%since 1990
from 37 / sq mi in 1990
US average: 242
41.1
+11%since 1990
from 36.9 in 1990
US average: 35.2
Population, 19902024
15K16K17K18K18K1990201020202024Jefferson County
202416K
1990201020202024
Section 02

Income & economy

$33,851
+14%inflation adjusted, since 1990
from $22,630 in 1990
US average: $42,589
1990 – 2024
$19,579
+68%since 1990
from $11,664 in 1990
US average: $21,522
10.9%
−2.9 ptssince 1990
from 13.9% in 1990
US average: 12.4%
Section 03

Housing

$72,700
+18%inflation adjusted, since 1990
from $46,800 in 1990
US average: $120,530
1990 – 2024
$426
−5%inflation adjusted, since 1990
from $339 in 1990
US average: $602
67.2%
+0.6 ptssince 1990
from 66.7% in 1990
32.8% rent
2.1
+4%since 1990
from 2.1 in 1990
1990 – 2024
RELATED:See current rent listings in Jefferson County on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic98.4%(16,048)
Black0.6%(106)
Hispanic / Latino0.9%(144)
Asian0.6%(93)
Diversity Score6.1%(990)
2000
White, non-Hispanic94.7%(15,329)
Black0.6%(102)
Hispanic / Latino1.8%(297)
Asian1.7%(275)
Diversity Score10.2%(1,654)
10
+68%since 1990
from 6 in 1990
1990 – 2024
Section 05

Education

31.2%
+4.8 ptssince 1990
from 26.5% in 1990
US average: 24.4%
High school or higher
88.1%
+5.8 ptssince 1990
from 82.3% in 1990
US average: 80.3%
11.9%
+0.7 ptssince 1990
from 11.2% in 1990
US average: 8.8%
Section 06

Commute & transportation

10.8 min
−49%since 1990
from 21.2 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.

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Frequently asked

How many people live in Jefferson County, Iowa?

Jefferson County, Iowa has about 16,181 residents according to the 2000 Census.

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

The typical household in Jefferson County, Iowa earns about $33,851 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 $72,700, and the typical rent is about $426 a month.

How educated are people in Jefferson County, Iowa?

About 31.2% 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 10.9% of people in Jefferson County, Iowa live below the federal poverty line.

Has Jefferson County, Iowa grown since 1990?

Yes, Jefferson County, Iowa has shrunk since 1990. The population has lost about 129 residents, a change of about -1 percent over that period.

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

How we source and harmonize this data →