Chicago, IL Profile: Facts, Map & Data


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Chicago, Illinois - Basic Facts

The City of Chicago is the largest city in Illinois with a population of 2,781,116 as of July 1, 2017. Chicago 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 Chicago is located at latitude 41.8376 and longitude -87.6818 in Cook County. The formal boundaries for the City of Chicago (see map below) encompass a land area of 227.77 sq. miles and a water area of 6.37 sq. miles. Cook County is in the Central time zone (GMT -6). The elevation is 587 feet.

The City of Chicago (GNIS ID: 428803) has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Beneath the boundary map are tables with Chicago population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Chicago: Chicagu, Cikago, The Windy City.

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City of Chicago, IL Boundary Map

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Chicago, IL Data & Demographics (As of July 1, 2017)


Total Population 2,781,116
Daytime Population: Workers 1,413,244
Daytime Population: Residents 1,463,997
Total Daytime Population (TDP) 2,877,241
Ratio TDP/Total Population1 1.03
Population in Households 2,720,667
Population in Familes 2,004,159
Population in Group Qrtrs 60,449
Population Density2 12,210
Diversity Index3 83


Median Household Income $51,421
Average Household Income $78,363
Per Capita Income $31,067


Total Housing Units 1,228,520 (100%)
Owner Occupied HU 449,998 (36.6%)
Renter Occupied HU 632,344 (51.5%)
Vacant Housing Units 146,178 (11.9%)
Median Home Value $248,522
Average Home Value $320,522


Total Households 1,082,342
Average Household Size 2.51
Family Households 587,638
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  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.


2010-2017 2017-2022
Population 0.43% 0.32%
Households 0.48% 0.35%
Families 0.26% 0.21%
Median Household Income   1.92%
Per Capita Income   2.87%

Chicago, IL - Peer Comparisons by Rank and Percentile

The table below compares Chicago to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2017 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 # 1 100th
Population Density # 5 100th
Diversity Index # 9 99th
Median Household Income # 771 44th
Per Capita Income # 373 73rd

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

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