Andover Flag

Andover

County:
Henry County
County Seat:
No
Area (mi²):
0.99
State:
Illinois

Andover is a village located in Henry County, Illinois. Andover has a 2026 population of 531. Andover is currently declining at a rate of -0.75% annually and its population has decreased by -4.32% since the most recent census, which recorded a population of 555 in 2020.

The median household income in Andover is $77,813 with a poverty rate of 3.69%. The median age in Andover is 44.8 years: 46.1 years for males, and 43.8 years for females. For every 100 females there are 113.8 males.

531
Total Population
536
Density (mi²)
-4 -0.75%
Growth

Andover Population

Andover Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026531-4-0.75%
2025535-4-0.74%
2024539-2-0.37%
2023541-4-0.73%
2022545-5-0.91%
2021550-5-0.9%
2020555-1-0.18%
201957210.18%
2018571-2-0.35%
201757300%
2016573-2-0.35%
201557500%
2014575-2-0.35%
2013577-1-0.17%
201257820.35%
2011576-2-0.35%
201057800%

Median Age

Overall: 44.8 years
Female: 43.8 years
Male: 46.1 years

Andover Adults

There are 344 adults, (90 of whom are seniors) in Andover.

Sex Ratio

Female: 203 (46.8%)
Male: 231 (53.2%)

Demographics

The racial composition of Andover includes 88.02% White, and smaller percentages for Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White38288.02%
Two or more races4911.29%
Asian30.69%
Race
Population ↓
Percentage (of total)
White122.76%
Race
Population ↓
Percentage (of total)
White37085.25%
Two or more races4911.29%
Asian30.69%

Andover Marital Status

Economics and Income Statistics

Andover 's average per capita income is $49,583. Household income levels show a median of $77,813. The poverty rate stands at 3.69%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$96,750-
Families$92,045$104,204
Households$77,813$83,076
Non Families$26,250$40,616

$49,583

Average Income

$77,813

Median Household Income

3.69%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)