COUNTY · 2000 CENSUS

Knox County

Illinois · 55,836 residents · 716.385 sq mi

Time machine

VIEWING

COMPARE TO

The short version

Knox County has lower-than-average household income, with a median household income of $35,407. Population has held roughly steady 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 $63,400.

At a glance

Lower income

below the US median

US median: $42,589

Older

median age 39.4

US median: 35.2

Less educated

15% hold a bachelor's degree

US average: 24%

Less affordable

home values up 31%, inflation adjusted

US median home: $120,530

Section 01

Population & growth

Total population

55,836

−1%since 1990

from 56,393 in 1990

1990 – 2025

Population density

78 / sq mi

−1%since 1990

from 79 / sq mi in 1990

US average: 242

Median age

39.4

+9%since 1990

from 36.3 in 1990

US average: 35.2

Population, 1990 – 2024

202449K

Section 02

Income & economy

Median household income

$35,407

+10%inflation adjusted, since 1990

from $24,523 in 1990

US average: $42,589

1990 – 2024

Per capita income

$17,985

+50%since 1990

from $11,973 in 1990

US average: $21,522

Poverty rate

11.1%

−2.7 ptssince 1990

from 13.9% in 1990

US average: 12.4%

Section 03

Housing

Median home value

$63,400

+31%inflation adjusted, since 1990

from $36,800 in 1990

US average: $120,530

1990 – 2024

Median gross rent

$411

+5%inflation adjusted, since 1990

from $298 in 1990

US average: $602

Owner-occupied

71.6%

+2.4 ptssince 1990

from 69.1% in 1990

28.4% rent

Afford Score

1.8

+19%since 1990

from 1.5 in 1990

1990 – 2024

RELATED:See current rent listings in Knox County on RentDataNow

Section 04

Race & ethnicity

1990

White, non-Hispanic93.1%(52,490)

Black4.8%(2,706)

Hispanic / Latino2.4%(1,373)

Asian0.6%(326)

Diversity Score21.4%(12,076)

2000

White, non-Hispanic88.4%(49,355)

Black6.2%(3,472)

Hispanic / Latino3.4%(1,896)

Asian0.7%(382)

Diversity Score24.1%(13,443)

Diversity Score

+12%since 1990

from 21 in 1990

1990 – 2024

Section 05

Education

Bachelor's degree or higher

14.6%

+1.9 ptssince 1990

from 12.7% in 1990

US average: 24.4%

High school or higher

81.8%

+5.3 ptssince 1990

from 76.6% in 1990

US average: 80.3%

Graduate degree

4.9%

+0.7 ptssince 1990

from 4.2% in 1990

US average: 8.8%

Section 06

Commute & transportation

Average commute

13.1 min

−24%since 1990

from 17.2 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.

Drill deeper

Places similar to Knox County

Head to head

Compare Knox County to nearby counties

KNOX COUNTY VS

Warren County

Income$67,385+90%

Home value$105,000+66%

Population16,222−66%

SEE FULL COMPARISON →

KNOX COUNTY VS

Stark County

Income$62,878+78%

Home value$104,500+65%

Population5,319−89%

SEE FULL COMPARISON →

KNOX COUNTY VS

Peoria County

Income$65,108+84%

Home value$158,500+150%

Population178,553+274%

SEE FULL COMPARISON →

KNOX COUNTY VS

Henry County

Income$71,911+103%

Home value$151,600+139%

Population48,095+1%

SEE FULL COMPARISON →

Frequently asked

How many people live in Knox County, Illinois?

Knox County, Illinois has about 55,836 residents according to the 2000 Census.

What is the median household income in Knox County, Illinois?

The typical household in Knox County, Illinois earns about $35,407 a year. Half of households make more than that, and half make less.

Is Knox County, Illinois expensive?

In Knox County, Illinois, the median home is worth about $63,400, and the typical rent is about $411 a month.

How educated are people in Knox County, Illinois?

About 14.6% of adults age 25 and over in Knox County, Illinois hold a bachelor's degree or higher.

What is the poverty rate in Knox County, Illinois?

About 11.1% of people in Knox County, Illinois live below the federal poverty line.

Has Knox County, Illinois grown since 1990?

Yes, Knox County, Illinois has shrunk since 1990. The population has lost about 557 residents, a change of about -1 percent over that period.

Keep going

Explore from here

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

How we source and harmonize this data →