Joliet, IL Profile: Facts & Data


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Joliet, Illinois - Basic Facts

The City of Joliet is the 3rd largest city in Illinois with a population of 150,937 as of July 1, 2018. Joliet ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Joliet is located at latitude 41.5181 and longitude -88.1584 in Will County. The formal boundaries for the City of Joliet (see map below) encompass a land area of 62.71 sq. miles and a water area of 0.66 sq. miles. Will County is in the Central time zone (GMT -6). The elevation is 541 feet.

While the primary coordinates for City of Joliet are located in Will County, it should be noted that the formal boundaries for this community also extend into and Kendall County.

The City of Joliet (GNIS ID: 2395477) 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 Joliet is located within Township of Troy, a minor civil division (MCD) of Will County.

Alternate Unofficial Names for Joliet: Juliet.

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  1. Joliet 2018 Demographic Data
  2. Growth Rates for Joliet (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.


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


Total Population 150,937
Population in Households 148,132
Population in Familes 126,723
Population in Group Qrtrs 2,805
Population Density2 2,407
Diversity Index3 74


Median Household Income $64,502
Average Household Income $78,618
Per Capita Income $26,280


Total Housing Units 52,889 (100%)
Owner Occupied HU 35,521 (67.2%)
Renter Occupied HU 13,464 (25.5%)
Vacant Housing Units 3,904 ( 7.4%)
Median Home Value $183,078
Average Home Value $199,654


Total Households 48,985
Average Household Size 3.02
Family Households 35,111
Average Family Size 4
  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 0.28% 0.47%
Households 0.24% 0.46%
Families 0.07% 0.36%
Median Household Income   1.78%
Per Capita Income   2.19%

Joliet, IL - Peer Comparisons by Rank and Percentile

The table below compares Joliet 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 # 3 100th
Population Density # 186 86th
Diversity Index # 46 97th
Median Household Income # 378 72nd
Per Capita Income # 802 41st

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

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