COUNTY · 1990 CENSUS
Adams County
Illinois · 66,090 residents · 855.151 sq mi
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Part of the Quincy micropolitan area
The short version
Adams County has lower-than-average household income, with a median household income of $23,317. Population has declined 3% since 2000. Median home value is $43,500. Households here earn about 28% less than the Illinois median.
At a glance
Lower income
below the US median
US median: $30,130
Older
median age 35.8
US median: 33.0
Less educated
14% hold a bachelor's degree
US average: 20%
More affordable
home values down 22%, inflation adjusted
US median home: $93,722
Section 01
Population & growth
Population, 1990 – 2024
202465K
Age distribution, 1990
Under 56.8%(4,509)
5 to 97.4%(4,907)
10 to 147.2%(4,727)
15 to 196.9%(4,580)
20 to 246.2%(4,069)
25 to 3414.4%(9,537)
35 to 4413.3%(8,774)
45 to 5410.4%(6,867)
55 to 649.6%(6,362)
65 to 749.4%(6,205)
75 to 846.3%(4,170)
85 and over2.1%(1,383)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$23,317
−12%inflation adjusted, since 2000
vs $34,784 in 2000
US average: $30,130
1990 – 2024
Section 03
Housing
$43,500
−22%inflation adjusted, since 2000
vs $73,100 in 2000
US average: $93,722
1990 – 2024
RELATED:See current rent listings in Adams County on RentDataNow
Section 04
Race & ethnicity
2000
White, non-Hispanic94.6%(64,611)
Black3%(2,077)
Hispanic / Latino0.8%(567)
Asian0.4%(269)
Other0%
1990
White, non-Hispanic96.8%(63,982)
Black2.5%(1,684)
Hispanic / Latino0.2%(154)
Asian0.3%(229)
Other0.3%(195)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry
Detailed origin tables are available for 2024; showing 2024 data.
Hispanic origin
Mexican1.7%(1,084)
Puerto Rican0.1%(70)
South American0.1%(45)
Cuban0.1%(39)
Colombian0%(32)
Central American0%(15)
Honduran0%(15)
Venezuelan0%(13)
Asian origin
Filipino0.3%(190)
Asian Indian0.1%(79)
Chinese0.1%(59)
Korean0.1%(39)
Indonesian0%(16)
Japanese0%(7)
Vietnamese0%(6)
Laotian0%(5)
Taiwanese0%(3)
Pacific Islander origin
Native Hawaiian0.1%(33)
Ancestry
German34%(22,047)
English10.4%(6,733)
Irish10%(6,457)
American5.6%(3,594)
Italian2.1%(1,345)
French1.7%(1,115)
Scottish1.7%(1,109)
Swedish1.2%(770)
Dutch1.1%(700)
Polish1.1%(683)
Scotch-Irish0.6%(397)
Subsaharan African0.5%(323)
+ 33 more ancestry groups with data
Welsh0.4%(279)
Norwegian0.4%(248)
Danish0.3%(181)
West Indian0.3%(180)
Arab0.2%(156)
British0.2%(152)
Czech0.2%(114)
Lithuanian0.1%(97)
Greek0.1%(95)
Swiss0.1%(88)
Egyptian0.1%(80)
Austrian0.1%(75)
Nigerian0.1%(71)
Belgian0.1%(69)
Slovak0.1%(69)
Serbian0.1%(54)
Russian0.1%(52)
Finnish0.1%(43)
Ukrainian0.1%(37)
Lebanese0.1%(36)
Jordanian0.1%(35)
Brazilian0.1%(33)
Hungarian0%(31)
Romanian0%(22)
Portuguese0%(21)
Canadian0%(18)
Slovene0%(13)
Iranian0%(6)
Jamaican0%(4)
Syrian0%(3)
French Canadian0%(3)
Haitian0%(3)
Moroccan0%(2)
Section 05
Education
High school or higher
75.1%
−8.6 ptsvs 2000
vs 83.7% in 2000
US average: 75.2%
Section 06
Commute & transportation
Section 07
Work & employment
No data for the years selected.
Section 08
People & community
No data for the years selected.
Marital status (2024)
Men 15+
Never married32%(8,272)
Married52.9%(13,658)
Widowed3.2%(818)
Divorced11.9%(3,068)
Women 15+
Never married26.7%(7,175)
Married49.9%(13,410)
Widowed9.8%(2,631)
Divorced13.7%(3,675)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Drill deeper
Places similar to Adams County
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Pop 67,225
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Pop 64,665
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Pop 62,657
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Pop 61,701
Places similar to Adams CountyHead to head
Compare Adams County to nearby counties
ADAMS COUNTY VS
Brown County
Income$67,917+191%
Home value$150,300+246%
Population6,401−90%
SEE FULL COMPARISON →
ADAMS COUNTY VS
Marion County
Income$62,903+170%
Home value$162,000+272%
Population28,525−56%
SEE FULL COMPARISON →
ADAMS COUNTY VS
Hancock County
Income$65,865+182%
Home value$113,800+162%
Population16,803−74%
SEE FULL COMPARISON →
ADAMS COUNTY VS
Lewis County
Income$59,934+157%
Home value$130,200+199%
Population9,879−85%
SEE FULL COMPARISON →
Frequently asked
How many people live in Adams County, Illinois?
Adams County, Illinois has about 66,090 residents according to the 1990 Census.
What is the median household income in Adams County, Illinois?
The typical household in Adams County, Illinois earns about $23,317 a year. Half of households make more than that, and half make less.
Is Adams County, Illinois expensive?
In Adams County, Illinois, the median home is worth about $43,500, and the typical rent is about $275 a month.
How educated are people in Adams County, Illinois?
About 13.7% of adults age 25 and over in Adams County, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Adams County, Illinois?
About 13.2% of people in Adams County, Illinois live below the federal poverty line.
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19 census tracts
Census Tract 11Census Tract 106Census Tract 101Census Tract 1Census Tract 10.01Census Tract 6Census Tract 102Census Tract 4Census Tract 104Census Tract 105Census Tract 2.02Census Tract 103.01Census Tract 103.02Census Tract 10.02Census Tract 9Census Tract 8Census Tract 2.01Census Tract 5Census Tract 716 ZIP codes
ZIP 62301ZIP 62305ZIP 62320ZIP 62347ZIP 62351ZIP 62360ZIP 62376ZIP 62324ZIP 62338ZIP 62339ZIP 62349ZIP 62325ZIP 62365ZIP 62348ZIP 62359ZIP 62346Up the hierarchy
All counties in IllinoisDATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024