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 2026 population of 18,752. 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 -0.37% since the most recent census, which recorded a population of 18,821 in 2020.

The median household income in Ottawa is $71,413 with a poverty rate of 17.3%. The median age in Ottawa is 39.8 years: 39.5 years for males, and 39.9 years for females. For every 100 females there are 88.3 males.

18.8K
Total Population
1,259
Density (mi²)
-11 -0.06%
Growth

Ottawa Population

Ottawa Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202618,752-11-0.06%
202518,763-12-0.06%
202418,775340.18%
202318,741780.42%
202218,663-127-0.68%
202118,790-31-0.16%
202018,821-13-0.07%
201918,139-78-0.43%
201818,217-50-0.27%
201718,267-76-0.41%
201618,343-96-0.52%
201518,439-105-0.57%
201418,544-96-0.52%
201318,640-52-0.28%
201218,692-117-0.62%
201118,809-103-0.54%
201018,9121440.77%
200018,3078564.91%
199017,451-715-3.94%
198018,166-550-2.94%
197018,716-692-3.57%
196019,4082,45114.45%
195016,9579525.95%
194016,0059116.04%
193015,0944,27839.55%
192010,8161,28113.43%
19109,535-1,053-9.95%
190010,5886036.04%
18909,9852,15127.46%
18807,834981.27%
18707,73600%

Median Age

Overall: 39.8 years
Female: 39.9 years
Male: 39.5 years

Ottawa Adults

There are 13,779 adults, (3,024 of whom are seniors) in Ottawa.

Sex Ratio

Female: 9,797 (53.1%)
Male: 8,650 (46.9%)

Demographics

The racial composition of Ottawa includes 87.67% White, and smaller percentages for Black or African American, other race, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White16,17387.67%
Two or more races1,1746.36%
Black or African American4582.48%
Other race4572.48%
Asian1841%
Native Hawaiian or Pacific Islander10.01%
Race
Population ↓
Percentage (of total)
White9445.12%
Two or more races4602.49%
Other race4572.48%
Race
Population ↓
Percentage (of total)
White15,22982.56%
Two or more races7143.87%
Black or African American4582.48%
Asian1841%
Native Hawaiian or Pacific Islander10.01%

Ottawa Marital Status

Economics and Income Statistics

Ottawa 's average per capita income is $47,562. Household income levels show a median of $71,413. The poverty rate stands at 17.3%.

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$105,930-
Families$83,092$101,132
Households$71,413$96,329
Non Families$42,500$82,012

$47,562

Average Income

$71,413

Median Household Income

17.3%

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)