Ottawa Flag

Ottawa

County:
LaSalle County
County Seat:
Yes
Area (mi²):
14.895
State:
Illinois

Ottawa is a city located in LaSalle County, Illinois. Ottawa has a 2025 population of 18,763 . It is also the county seat of LaSalle County . Ottawa is currently declining at a rate of -0.06% annually and its population has decreased by -0.31% since the most recent census, which recorded a population of 18,821 in 2020.

The average household income in Ottawa is $92,222 with a poverty rate of 14.44%. The median age in Ottawa is 40.3 years: 39 years for males, and 42.3 years for females. For every 100 females there are 92.0 males.

18.8K
Total Population
1,260
Density (mi²)
-12 -0.06%
Growth

Ottawa Population

Ottawa Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Ottawa includes 89.33% White, and smaller percentages for Black or African American, other race, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White (89.33%)

Two or more races (4.73%)

Black or African American (2.87%)

Other race (1.93%)

Asian (1.14%)

Native Hawaiian or Pacific Islander (0.01%)

Race
Population
Percentage (of total)
White16,71789.33%
Two or more races8854.73%
Black or African American5372.87%
Other race3611.93%
Asian2131.14%
Native Hawaiian or Pacific Islander10.01%

Ottawa Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Ottawa's average per capita income is $46,298. Household income levels show a median of $73,011. The poverty rate stands at 14.44%.

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$106,518-
Families$86,372$101,793
Households$73,011$92,222
Non Families$43,243$72,447

$46,298

Average Income

$73,011

Median Household Income

14.44%

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)