Summary for Chicago

About Chicago (Click for our profile page)

Located in: Primarily Cook County (see below). A portion of Chicago extends into DuPage County.

Pronunciation: shi-KAW-goh <1>

Time Zone: Chicago lies in the Central Time Zone (CST/CDT)<2>

Telephone Area Codes: 312, 872<3>

ZIP Codes: 60601-60626, 60628-60634, 60636-60641, 60643-60647, 60649, 60651-60657, 60659-60661, 60663-60665, 60667-60675, 60677-60681, 60683-60685, 60687, 60690-60691, 60693-60694, 60697, 60699, 60701<4>

Elevation: 590 feet [179.83 m] above sea level<5>

From the 2010 US Census (For more detail, see our Census Page for Chicago)

Population

Year	Population
2019 Est:<6>	2,691,497 (0.15% decrease since 2010)
2010:	2,695,598 (6.92% decrease since 2000)
2000:	2,896,016

Websites for Chicago

Official Website: www.cityofchicago.org/

Chamber of Commerce: www.chicagolandchamber.org/

Junior League: www.jlchicago.org/

GPS Coordinates (Latitude/Longitude)<7>

For the purpose of mapping and calculating distances, we have chosen the following reference point for Chicago:

Lat: 41.875800° (or 41°52'32" N)

Lon: -87.636100° (or -87°38'9" W)

USGS Topo Map: Englewood<8>

Federal GNIS/FIPS Codes for Chicago

GNIS ID: 428803

FIPS State / Place Code: 17 / 14000

(For more about Federal Codes, see our Misc Page for Chicago)

About Cook County

The city of Chicago is the County Seat for Cook County.

From the 2010 US Census (For more detail, see our Census Page for Cook)

Population

Year	Population
2019 Est:	5,150,233 (0.94% decrease since 2010)
2010	5,199,016 (3.31% decrease since 2000)
2000:	5,376,741

Total Area:<9> 1,634 sq. miles [4,234.3 km²] - of which 42.18% is water (689 sq. miles [1,785.9 km²])

Housing Units: <10> 2,180,359

Official Website: www.co.cook.il.us/

Federal GNIS/FIPS Codes for Cook

GNIS ID: 1784766

FIPS State / County Code: 17 / 031

(For more about Federal Codes, see our Misc Page for Chicago)

About Illinois

From the US Census

Population

Year	Population
2019 Est:	12,667,017 (1.28% decrease since 2010)
2010:	12,830,632 (3.31% increase since 2000)
2000:	12,419,293

Websites for State of Illinois

Official Website: https://illinois.gov

Tourism: https://www.enjoyillinois.com/

Parks: https://www.dnr.illinois.gov/

Fishing: https://www.ifishillinois.org/

Hunting: https://dnr.illinois.gov/hunting.html

Federal GNIS/FIPS Codes for State of Illinois

GNIS ID: 1779784

FIPS State: 17

(For more about Federal Codes, see our Misc Page for Chicago)

Off-the-Road Links ...

The official website for Chicago: www.cityofchicago.org/

The official website for Cook County: www.co.cook.il.us/

The official website for State of Illinois: https://illinois.gov

Footnotes ...

<1>	The pronunciation we've provided is our attempt to give a phonetic pronunciation for Chicago. While it might not be exactly right, hopefully it will be close. If we have it wrong or there's a better way to pronounce the name, please contact us through our Feedback Page.
<2>	While Chicago is in the Central Time Zone, the area to the east is in the Eastern Time Zone (EST/EDT).
<3>	When there's a risk of an area code running out of phone numbers, an 'Overlay Area Code' is created that has the same geographic boundaries as the existing area code. In this case, the 312 code has been Overlayed with the 872 area code. New phone numbers in the Chicago area will be assigned with one of these codes: 312, 872. As a result, placing a call in the Chicago area will require 10-digit dialing (where you enter both the area code and then the phone number).
<4>	ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a city (such as Chicago). When looking for a ZIP Code, whether Chicago or elsewhere, it's always best to check the website of the United States Postal Service (USPS). Our list of ZIP Codes for Chicago includes: 60601, 60602, 60603, 60604, 60605, 60606, 60607, 60608, 60609, 60610, 60611, 60612, 60613, 60614, 60615, 60616, 60617, 60618, 60619, 60620, 60621, 60622, 60623, 60624, 60625, 60628, 60629, 60630, 60631, 60632, 60633, 60636, 60637, 60638, 60639, 60640, 60643, 60644, 60645, 60646, 60649, 60651, 60652, 60653, 60654, 60655, 60656, 60659, 60660, 60663, 60664, 60667, 60668, 60669, 60670, 60671, 60672, 60673, 60674, 60677, 60678, 60679, 60680, 60683, 60684, 60687, 60690, 60693, 60697, 60699 & 60701.
<5>	The elevation is an estimate for the area around Chicago - it will be higher in some places and lower in others.
<6>	Every year, the US Census Bureau creates a population estimate for the preceeding year. Keep in mind that this value is an estimate and not an actual count. The most recent Census estimate is for the year 2019.
<7>	Longitude & latitude values may not be the geographic center of Chicago, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source.
<8>	Name of the USGS 7.5 Minute topographic map which includes Chicago.
<9>	The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Chicago. The value given by the Census Bureau reflects their statistical (or sampling) requirements. For example, if there is a cluster of people living just outside of the community's official boundary, the Census-defined area might be expanded to include that group.
<10>	A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway).