Ottawa, IL Profile: Facts & Data


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Ottawa, Illinois - Basic Facts

The City of Ottawa had a population of 18,391 as of July 1, 2018.

The primary coordinate point for Ottawa is located at latitude 41.3456 and longitude -88.8426 in LaSalle County. The formal boundaries for the City of Ottawa (see map below) encompass a land area of 11.95 sq. miles and a water area of 0.8 sq. miles. LaSalle County is in the Central time zone (GMT -6). The elevation is 482 feet.

The City of Ottawa (GNIS ID: 2396106) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Ottawa is located within Township of Ottawa, a minor civil division (MCD) of LaSalle County.

Alternate Unofficial Names for Ottawa: Ottowa, South Ottawa.

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  1. Ottawa 2018 Demographic Data
  2. Growth Rates for Ottawa (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Illinois Research Tools (Easy Tools & Current Data)
  3. Illinois Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Ottawa, IL Data & Demographics (As of July 1, 2018)


Total Population 18,391
Population in Households 17,827
Population in Familes 14,042
Population in Group Qrtrs 564
Population Density2 1,539
Diversity Index3 31


Median Household Income $52,923
Average Household Income $68,525
Per Capita Income $29,003


Total Housing Units 8,499 (100%)
Owner Occupied HU 4,908 (57.7%)
Renter Occupied HU 2,735 (32.2%)
Vacant Housing Units 856 (10.1%)
Median Home Value $145,775
Average Home Value $170,915


Total Households 7,643
Average Household Size 2.33
Family Households 4,747
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2018 2018-2023
Population -0.23% -0.45%
Households -0.19% -0.4%
Families -0.29% -0.53%
Median Household Income   2.81%
Per Capita Income   3.05%

Ottawa, IL - Peer Comparisons by Rank and Percentile

The table below compares Ottawa to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 138 90th
Population Density # 446 67th
Diversity Index # 356 74th
Median Household Income # 756 45th
Per Capita Income # 573 58th

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.

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