Illinois / Census place 1756926

Ottawa

A Census profile of the people, homes, and daily patterns that shape this place.

Official Census name: Ottawa city

At a glance

A city in numbers.

Population
18,684
2025 estimate
Annual change
-0.2%
Population estimate
Density
1,256/sq mi
14.9 sq mi land area
Median age
39.8 years
ACS 5-year estimate

Living here

The everyday equation.

Households, homes, education, and the time it takes to get around.

Median household income
$71,413
Median home value
$154,000
Median gross rent
$920
Bachelor’s degree or higher
23.3%
Typical commute
22.7 min
Public transit commute
0.2%

Climate normals

The long view of weather.

Thirty-year averages, not a forecast. Temperature and precipitation describe the typical conditions recorded from 1991 through 2020.

Representative station: CHICAGO AURORA MUNI AP (34 mi from place center)
Average high
59.7°F
Average low
39.1°F
Annual rainfall
33.8"
Annual snowfall
0"

Month by month

A year in Ottawa.

Typical high and low °F
JFMAMJJASOND
Typical precipitation inches
J
F
M
A
M
J
J
A
S
O
N
D

Data vintage

Population is from the 2025 Population Estimates Program. Household, housing, education, and commute data are from the 2020-2024 American Community Survey 5-year release.

Similar places

More places to consider.

Selected by the closest mix of population, density, median home value, and average annual high.

PA

West Mifflin, PA

Population, housing, work, and travel data for this Census place.

Population
18,707
Median home
$151,600
MO

Kirksville, MO

Population, housing, work, and travel data for this Census place.

Population
17,863
Median home
$153,900
OH

Defiance, OH

Population, housing, work, and travel data for this Census place.

Population
17,009
Median home
$139,900

Keep exploring

Compare Ottawa with West Mifflin