COUNTY · 1990 CENSUS

Rock County

Wisconsin · 139,510 residents · 718.167 sq mi

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The short version

Rock County has roughly average household income, with a median household income of $30,632. Population has declined 8% since 2000. Median home value is $52,500.

At a glance

Average income

near the US median

US median: $30,130

Mid-age

median age 33.0

US median: 33.0

Less educated

13% hold a bachelor's degree

US average: 20%

More affordable

home values down 30%, inflation adjusted

US median home: $93,722

Section 01

Population & growth

Total population

139,510

−8%vs 2000

vs 152,307 in 2000

1990 – 2025

Population density

194 / sq mi

−8%vs 2000

vs 212 / sq mi in 2000

US average: 221

Median age

33.0

−8%vs 2000

vs 35.9 in 2000

US average: 33.0

Population, 1990 – 2024

2024164K

Section 02

Income & economy

Median household income

$30,632

−11%inflation adjusted, since 2000

vs $45,517 in 2000

US average: $30,130

1990 – 2024

Per capita income

$13,428

−36%vs 2000

vs $20,895 in 2000

US average: $14,340

Poverty rate

9.9%

+2.6 ptsvs 2000

vs 7.3% in 2000

US average: 13.2%

Section 03

Housing

Median home value

$52,500

−30%inflation adjusted, since 2000

vs $98,300 in 2000

US average: $93,722

1990 – 2024

Median gross rent

$387

−6%inflation adjusted, since 2000

vs $543 in 2000

US average: $450

Owner-occupied

68.2%

−3.0 ptsvs 2000

vs 71.1% in 2000

31.8% rent

Afford Score

1.7

−21%vs 2000

vs 2.2 in 2000

1990 – 2024

RELATED:See current rent listings in Rock County on RentDataNow

Section 04

Race & ethnicity

2000

White, non-Hispanic89.2%(135,884)

Black4.6%(6,943)

Hispanic / Latino3.9%(5,953)

Asian0.8%(1,180)

Other0%

Diversity Score21.9%(33,343)

1990

White, non-Hispanic93.8%(130,827)

Black4.7%(6,537)

Hispanic / Latino1.2%(1,704)

Asian0.6%(906)

Other0.9%(1,240)

Diversity Score17.4%(24,291)

Diversity Score

−20%vs 2000

vs 22 in 2000

1990 – 2024

Section 05

Education

Bachelor's degree or higher

13.3%

−3.4 ptsvs 2000

vs 16.7% in 2000

US average: 20.3%

High school or higher

78.2%

−5.7 ptsvs 2000

vs 83.9% in 2000

US average: 75.2%

Graduate degree

4.4%

−1.0 ptsvs 2000

vs 5.4% in 2000

US average: 7.1%

Section 06

Commute & transportation

Average commute

18.3 min

+35%vs 2000

vs 13.6 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.

Drill deeper

Places similar to Rock County

Head to head

Compare Rock County to nearby counties

ROCK COUNTY VS

Winnebago County

Income$65,837+115%

Home value$164,500+213%

Population283,674+70%

SEE FULL COMPARISON →

ROCK COUNTY VS

Green County

Income$82,852+170%

Home value$250,200+377%

Population37,227−78%

SEE FULL COMPARISON →

ROCK COUNTY VS

Walworth County

Income$80,520+163%

Home value$302,700+477%

Population106,127−36%

SEE FULL COMPARISON →

ROCK COUNTY VS

Boone County

Income$84,571+176%

Home value$216,900+313%

Population53,568−68%

SEE FULL COMPARISON →

Frequently asked

How many people live in Rock County, Wisconsin?

Rock County, Wisconsin has about 139,510 residents according to the 1990 Census.

What is the median household income in Rock County, Wisconsin?

The typical household in Rock County, Wisconsin earns about $30,632 a year. Half of households make more than that, and half make less.

Is Rock County, Wisconsin expensive?

In Rock County, Wisconsin, the median home is worth about $52,500, and the typical rent is about $387 a month.

How educated are people in Rock County, Wisconsin?

About 13.3% of adults age 25 and over in Rock County, Wisconsin hold a bachelor's degree or higher.

What is the poverty rate in Rock County, Wisconsin?

About 9.9% of people in Rock County, Wisconsin live below the federal poverty line.

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

How we source and harmonize this data →