Columbia Flag

Columbia

County:
Monroe County
County Seat:
No
Area (mi²):
10.55
State:
Illinois

Columbia is a city located in Monroe County, Illinois. Columbia has a 2026 population of 10,861. Columbia is currently declining at a rate of -0.27% annually and its population has decreased by -1.57% since the most recent census, which recorded a population of 11,034 in 2020.

The median household income in Columbia is $107,606 with a poverty rate of 5.38%. The median age in Columbia is 42.4 years: 42.2 years for males, and 42.5 years for females. For every 100 females there are 97.3 males.

10.9K
Total Population
1,029
Density (mi²)
-29 -0.27%
Growth

Columbia Population

Columbia Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202610,861-29-0.27%
202510,890-29-0.27%
202410,919-74-0.67%
202310,993-5-0.05%
202210,99840.04%
202110,994-40-0.36%
202011,034220.2%
201910,527930.89%
201810,4341121.09%
201710,322680.66%
201610,254980.96%
201510,156820.81%
201410,074870.87%
20139,9871041.05%
20129,883570.58%
20119,8261011.04%
20109,725180.19%
20007,9222,39843.41%
19905,5241,25529.4%
19804,269811.93%
19704,18800%

Median Age

Overall: 42.4 years
Female: 42.5 years
Male: 42.2 years

Columbia Adults

There are 8,472 adults, (1,839 of whom are seniors) in Columbia.

Sex Ratio

Female: 5,640 (50.7%)
Male: 5,487 (49.3%)

Demographics

The racial composition of Columbia includes 95.65% White, and smaller percentages for Two or more races, other race, Black or African American, Asian, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White10,64395.65%
Two or more races2992.69%
Other race950.85%
Black or African American730.66%
Asian130.12%
Native American40.04%
Race
Population ↓
Percentage (of total)
White840.75%
Other race820.74%
Two or more races180.16%
Race
Population ↓
Percentage (of total)
White10,55994.9%
Two or more races2812.53%
Black or African American730.66%
Other race130.12%
Asian130.12%
Native American40.04%

Columbia Marital Status

Economics and Income Statistics

Columbia 's average per capita income is $69,839. Household income levels show a median of $107,606. The poverty rate stands at 5.38%.

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$149,203-
Families$134,688$155,677
Households$107,606$127,467
Non Families$51,734$59,073

$69,839

Average Income

$107,606

Median Household Income

5.38%

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)