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COUNTY · 2000 CENSUS

Washington County

Iowa · 20,670 residents · 568.828 sq mi
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The short version

Washington County has roughly average household income, with a median household income of $39,103. Population has held roughly steady since 1990. Median home value has more than doubled since 1990, reaching $84,200.

At a glance
Lower income
below the US median
US median: $42,589
Older
median age 38.8
US median: 35.2
Less educated
16% hold a bachelor's degree
US average: 24%
Less affordable
home values up 49%, inflation adjusted
US median home: $120,530
Section 01

Population & growth

20,670
+5%since 1990
from 19,612 in 1990
1990 – 2025
36 / sq mi
+5%since 1990
from 34 / sq mi in 1990
US average: 242
38.8
+9%since 1990
from 35.6 in 1990
US average: 35.2
Population, 19902024
19K20K21K22K23K1990201020202024Washington County
202423K
1990201020202024
Section 02

Income & economy

$39,103
+15%inflation adjusted, since 1990
from $25,822 in 1990
US average: $42,589
1990 – 2024
$18,221
+60%since 1990
from $11,387 in 1990
US average: $21,522
7.6%
−1.9 ptssince 1990
from 9.5% in 1990
US average: 12.4%
Section 03

Housing

$84,200
+49%inflation adjusted, since 1990
from $42,800 in 1990
US average: $120,530
1990 – 2024
$424
+8%inflation adjusted, since 1990
from $297 in 1990
US average: $602
75.3%
+3.6 ptssince 1990
from 71.8% in 1990
24.7% rent
2.2
+30%since 1990
from 1.7 in 1990
1990 – 2024
RELATED:See current rent listings in Washington County on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic99%(19,420)
Black0.4%(76)
Hispanic / Latino0.8%(156)
Asian0.3%(55)
Diversity Score4.4%(853)
2000
White, non-Hispanic96%(19,838)
Black0.3%(58)
Hispanic / Latino2.7%(564)
Asian0.2%(51)
Diversity Score8%(1,648)
8
+83%since 1990
from 4 in 1990
1990 – 2024
Section 05

Education

16.4%
+4.7 ptssince 1990
from 11.7% in 1990
US average: 24.4%
High school or higher
82.5%
+5.5 ptssince 1990
from 76.9% in 1990
US average: 80.3%
4.8%
+1.9 ptssince 1990
from 3.0% in 1990
US average: 8.8%
Section 06

Commute & transportation

15.3 min
−39%since 1990
from 25.1 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 Washington County, Iowa?

Washington County, Iowa has about 20,670 residents according to the 2000 Census.

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

The typical household in Washington County, Iowa earns about $39,103 a year. Half of households make more than that, and half make less.

Is Washington County, Iowa expensive?

In Washington County, Iowa, the median home is worth about $84,200, and the typical rent is about $424 a month.

How educated are people in Washington County, Iowa?

About 16.4% of adults age 25 and over in Washington County, Iowa hold a bachelor's degree or higher.

What is the poverty rate in Washington County, Iowa?

About 7.6% of people in Washington County, Iowa live below the federal poverty line.

Has Washington County, Iowa grown since 1990?

Yes, Washington County, Iowa has grown since 1990. The population has added about 1,058 residents, a change of about 5 percent over that period.

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

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