ZIP Codes of Cook County, IL

Population & People
Population & People
Total Population
5,132,257
Household Income
Household Income
Median Income
$92,978
Housing
Housing
Total Housing Units
2,256,940
Business & Economy
Business & Economy
Total Businesses
133,032
Employment
Employment
Employment Rate
61.52%
Education
Education
Bachelor's Degree+
42.56%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 215 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:215 ZIP Codes (165 Standard, 24 PO Box, 26 Unique) [See All]
Area Codes:217 / 224 / 312 / 331 / 447 / 464 / 630 / 708 / 773 / 815 / 847 / 872
Timezone:Central (GMT -06:00)
Local Time:11:53:17 PM
Population:5,132,257 [See All]
FIPS:17031
CBSA:Chicago-Naperville-Elgin, IL-IN
Land Area:921 sq mi
Water Area:26 sq mi
Coordinates:41.8656, -87.7717
Quick Link:
https://www.zip-codes.com/county/il-cook.asp
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#2 most populous county in America
5,132,257 residents — one of just ten US counties this populous.
Illinois's densest county
5,572 people per square mile.
Sharp income gradient
Wealthiest ZIP earns 7.8× the poorest — $250,001 vs $31,905.
Illinois's most foreign-born county
21.6% of residents are foreign-born.
Extreme geographic sprawl
The largest ZIP spans 375× the smallest by area — 31.1 sq mi down to 0.08.
Extreme education divide
Bachelor's share ranges 10.8% to 93.6% across ZIPs — a 83-point gap.

Standout ZIPs in this County


Most Populous
Chicago · 108,324 people
2.1% of county total
Highest Income
Winnetka · $250,001 median
2.7× county average
Largest Land Area
Chicago Heights · 31.1 sq mi
Spans the most ground
Fastest Growth
Oak Park · 59.8% (10-yr)
2,174 → 3,475 residents
Most Educated
Chicago · 93.6% bachelor's+
2,948 of 3,148 adults 25+

Things worth knowing about Cook County


5,132,257 residents live across 215 ZIPs covering 921 sq mi, served by 96 distinct USPS-recognized cities.

Population moved from 5,180,697 to 5,121,430 from 2014 to 2024 — a -1.1% change. 73 ZIPs gained residents, 91 lost.

The county's wealthiest ZIP 60093 (Winnetka, $250,001 median) and poorest ZIP 60621 (Chicago, $31,905) are 23.7 miles apart — a 7.8× income gap across local geography.

Median home values vary 17.1× across this county — from $91,000 in 60426 (Harvey) to $1,560,300 in 60043 (Kenilworth).

Density varies 96× across the county — from 484 people/sq mi in 60480 (Willow Springs) to 46,412 in 60611 (Chicago).

Most of the decade's growth concentrated around Chicago — top growth ZIPs averaged +52.7% over the past ten years ( 60301 , 60654 and 60601 ).

Educational attainment ranges from 10.8% bachelor's+ in 60426 (Harvey) to 93.6% in 60606 (Chicago) — the breadth of educational profiles across the area.

Within Illinois, this is the #1 most populous of 102 counties and ranks #10 for median household income .

On the national stage, Cook County is the #2 most populous US county .

Hosts 4 single-entity Unique ZIPs: 60196Multi High Volume Firms ; 60208Northwestern Univ Admin ; 60688Jt Weeker Isc ; and 60179Sears Roebuck And Company .

Weighted by population, the typical household earns about $86,837 across the county — reflecting what a typical resident sees, not a simple ZIP average.

42.6% of adults age 25+ hold a bachelor's degree or higher (1,534,805 of 3,606,220 reporting). The most-educated ZIPs cluster around Chicago.

165 Standard delivery, 24 PO Box only, 26 single-entity Unique ZIPs serve this county.

Stories about Cook County


Higher-education hub

39 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.

Chicago
94.8%
1,298 residents
Chicago
93.6%
3,840 residents
Chicago
91.5%
25,755 residents
Kenilworth
91.0%
2,503 residents
Glencoe
88.5%
8,352 residents
Chicago
88.3%
37,705 residents
Chicago
87.3%
11,398 residents
Chicago
87.2%
70,693 residents
Chicago
86.6%
71,904 residents
Chicago
83.9%
15,235 residents

Single-entity addresses

26 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.

Northwestern Univ Admin
255 residents
Bank Of America
non-residential
National City Bank
non-residential
Div Of Postal Inspectors
non-residential
American National Bank
non-residential
Commonwealth Edison
non-residential
Bank Of America
non-residential
Cna Center
non-residential
Northern Trust Co
non-residential
Harris Bank
non-residential
Fifth Third Bank
non-residential
Bank Of America
non-residential
Bank Of America
non-residential
Bank Of America
non-residential
Peoples Gas And Light
non-residential
Jp Morgan Chase
non-residential
Pnc Bank
non-residential
Jp Morgan Chase
non-residential
Willis Tower
non-residential
Jp Morgan Chase
non-residential
Multi High Volume Firms
non-residential
Sears Roebuck And Company
non-residential
Mellon Financial Services
non-residential
Ww Grainger Inc
non-residential
Despl/Rsmt Bus Rply
non-residential
Jt Weeker Isc
non-residential

Two counties in one

Median household income spans 7.8× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.

Wealthiest ZIP
Winnetka
Median income: $250,001
Population: 19,867
Bachelor's+: 81.1%
vs
Poorest ZIP (pop >= 500)
Chicago
Median income: $31,905
Population: 28,301
Bachelor's+: 11.4%
For every $1 of household income in 60621, the typical household in 60093 earns $7.84.

All ZIP Codes in Cook County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
60629ChicagoStandard108,324$60,8267.0-5.8%
60618ChicagoStandard91,901$106,3845.1-4.5%
60632ChicagoStandard89,107$64,8097.6-2.5%
60647ChicagoStandard84,749$107,0603.9-3.0%
60639ChicagoStandard84,240$61,0894.9-8.8%
60804CiceroStandard82,797$70,8427.2-2.0%
60623ChicagoStandard81,277$51,8785.5-7.5%
60608ChicagoStandard80,737$73,3666.52.3%
60625ChicagoStandard76,760$85,7033.8-2.3%
60617ChicagoStandard74,790$51,77817.9-9.5%
60634ChicagoStandard73,885$88,5336.71.0%
60657ChicagoStandard71,904$110,9392.13.5%
60614ChicagoStandard70,693$136,4483.43.1%
60641ChicagoStandard68,894$83,7584.0-4.9%
60640ChicagoStandard65,445$73,2542.41.3%
60620ChicagoStandard64,871$48,1466.7-9.8%
60402BerwynStandard63,721$77,7185.8-0.8%
60651ChicagoStandard63,335$54,4093.63.9%
60609ChicagoStandard62,028$58,8967.8-0.6%
60016Des PlainesStandard60,898$86,57112.0-0.8%
60628ChicagoStandard60,431$54,64410.9-13.6%
60619ChicagoStandard59,503$45,2066.1-7.4%
60638ChicagoStandard57,074$91,07011.30.5%
60453Oak LawnStandard56,861$83,9118.6-0.3%
60056Mount ProspectStandard55,818$101,92210.80.4%
60630ChicagoStandard55,486$98,8604.6-2.6%
60622ChicagoStandard54,609$136,2772.50.0%
60616ChicagoStandard54,308$73,8193.88.8%
60637ChicagoStandard52,721$43,6094.37.9%
60613ChicagoStandard52,244$95,5722.26.0%
60411Chicago HeightsStandard52,175$62,07331.1-11.5%
60004Arlington HeightsStandard51,835$128,97911.43.2%
60626ChicagoStandard49,662$59,7131.80.9%
60645ChicagoStandard48,208$76,0452.34.1%
60649ChicagoStandard48,056$44,1753.26.3%
60644ChicagoStandard47,210$40,9503.5-4.8%
60643ChicagoStandard45,942$80,8527.6-9.8%
60610ChicagoStandard44,883$105,2261.116.6%
60201EvanstonStandard43,744$90,5454.42.4%
60615ChicagoStandard42,975$63,8762.34.5%
60660ChicagoStandard42,724$67,4791.33.2%
60659ChicagoStandard41,728$68,7042.17.6%
60025GlenviewStandard41,689$126,90410.26.2%
60462Orland ParkStandard41,456$96,52615.96.2%
60062NorthbrookStandard41,406$143,32319.83.0%
60707Elmwood ParkStandard41,116$84,7994.1-4.3%
60652ChicagoStandard41,074$80,0205.0-3.0%
60193SchaumburgStandard40,146$95,97210.2-0.2%
60107StreamwoodStandard38,886$101,10011.9-5.5%
60068Park RidgeStandard38,650$143,2227.33.0%
60090WheelingStandard38,298$85,3558.91.0%
60067PalatineStandard38,204$125,44613.4-0.3%
60611ChicagoStandard37,705$125,6750.823.0%
60133Hanover ParkStandard36,732$91,7638.6-4.3%
60074PalatineStandard36,460$84,0897.1-6.5%
60605ChicagoStandard36,210$123,9221.539.6%
60477Tinley ParkStandard35,976$94,92715.4-6.2%
60612ChicagoStandard35,744$60,9223.70.4%
60624ChicagoStandard35,263$34,0303.5-11.2%
60409Calumet CityStandard35,100$55,3697.2-6.3%
60169Hoffman EstatesStandard33,401$90,7749.4-2.2%
60653ChicagoStandard33,383$40,6662.37.6%
60076SkokieStandard32,953$113,8185.00.6%
60302Oak ParkStandard32,862$100,6803.02.3%
60007Elk Grove VillageStandard32,592$93,49416.8-3.7%
60607ChicagoStandard32,392$127,7322.324.9%
60202EvanstonStandard32,341$98,9893.0-0.7%
60636ChicagoStandard32,198$38,8073.9-19.8%
60525La GrangeStandard31,324$116,91813.9-1.1%
60631ChicagoStandard30,924$115,0003.810.5%
60714NilesStandard30,305$75,8006.30.7%
60656ChicagoStandard29,538$95,7662.62.2%
60005Arlington HeightsStandard28,843$99,7436.4-5.3%
60438LansingStandard28,806$75,6819.6-0.5%
60646ChicagoStandard28,780$112,5254.81.5%
60459BurbankStandard28,739$80,1164.2-1.2%
60077SkokieStandard28,501$78,5234.32.4%
60655ChicagoStandard28,434$114,7234.31.5%
60621ChicagoStandard28,301$31,9053.7-13.2%
60018Des PlainesStandard27,952$90,5749.1-3.7%
60091WilmetteStandard27,333$189,9095.40.0%
60452Oak ForestStandard26,739$93,0768.3-5.2%
60487Tinley ParkStandard26,043$131,7937.8-3.5%
60654ChicagoStandard25,755$147,3570.658.6%
60827RiverdaleStandard24,713$37,2177.1-14.1%
60053Morton GroveStandard24,619$111,1165.35.1%
60160Melrose ParkStandard24,549$66,1894.4-4.1%
60467Orland ParkStandard24,398$114,81216.3-10.7%
60706Harwood HeightsStandard24,260$84,5303.04.3%
60439LemontStandard24,192$121,72429.74.2%
60426HarveyStandard23,906$42,1967.5-17.0%
60406Blue IslandStandard23,327$56,5575.9-9.2%
60153MaywoodStandard23,201$68,8153.6-4.0%
60008Rolling MeadowsStandard22,800$94,3367.11.8%
60803AlsipStandard22,106$67,0147.6-3.8%
60642ChicagoStandard21,789$143,1751.812.3%
60466Park ForestStandard21,461$61,6546.2-5.5%
60473South HollandStandard21,225$85,6598.7-5.7%
60164Melrose ParkStandard20,872$81,2634.7-6.3%
60419DoltonStandard20,825$57,8874.5-8.7%
60443MattesonStandard20,663$92,13614.1-2.9%
60093WinnetkaStandard19,867$250,0018.42.5%
60430HomewoodStandard19,838$96,6296.0-3.5%
60194SchaumburgStandard19,756$97,9940.90.8%
60805Evergreen ParkStandard19,420$95,7193.4-2.5%
60513BrookfieldStandard19,343$110,3383.11.6%
60104BellwoodStandard18,256$79,5132.4-4.3%
60465Palos HillsStandard18,081$83,5335.62.7%
60131Franklin ParkStandard18,054$76,6585.3-0.3%
60304Oak ParkStandard16,955$136,1781.5-4.1%
60455BridgeviewStandard16,872$66,7454.11.9%
60192Hoffman EstatesStandard16,461$153,49512.0-1.1%
60154WestchesterStandard16,436$98,9544.1-2.4%
60478Country Club HillsStandard16,390$74,8266.7-4.2%
60546RiversideStandard16,322$113,5333.92.3%
60070Prospect HeightsStandard15,496$84,7753.7-3.3%
60601ChicagoStandard15,235$121,4580.439.8%
60429Hazel CrestStandard14,864$66,9884.3-5.6%
60457Hickory HillsStandard14,503$76,7863.62.7%
60445MidlothianStandard14,268$70,6344.6-45.4%
60458JusticeStandard14,200$60,7582.9-1.6%
60415Chicago RidgeStandard14,099$68,9642.3-1.8%
60026GlenviewStandard14,069$137,7784.42.1%
60130Forest ParkStandard13,943$77,2212.5-1.8%
60463Palos HeightsStandard13,722$107,9775.4-4.4%
60173SchaumburgStandard13,650$104,3905.612.7%
60526La Grange ParkStandard13,459$120,3082.6-1.1%
60558Western SpringsStandard13,446$230,2553.42.9%
60712LincolnwoodStandard13,112$109,7312.73.6%
60471Richton ParkStandard12,848$64,4944.2-8.4%
60633ChicagoStandard12,474$62,45810.3-4.5%
60305River ForestStandard11,992$146,7862.37.0%
60501Summit ArgoStandard11,432$63,2444.2-4.5%
60661ChicagoStandard11,398$125,7410.329.0%
60176Schiller ParkStandard11,393$69,6963.6-3.8%
60428MarkhamStandard10,927$60,0005.3-14.0%
60482WorthStandard10,897$55,7092.4-1.3%
60418CrestwoodStandard10,572$75,7523.3
60171River GroveStandard10,451$69,8582.01.4%
60534LyonsStandard10,327$70,8902.1-3.0%
60475StegerStandard10,035$67,4874.33.5%
60464Palos ParkStandard9,773$126,08712.52.7%
60422FlossmoorStandard9,542$134,4774.44.5%
60425GlenwoodStandard8,714$77,1744.1-4.2%
60022GlencoeStandard8,352$250,0013.7-0.4%
60162HillsideStandard8,084$72,3203.5-0.7%
60155BroadviewStandard7,906$64,5661.9-0.5%
60480Willow SpringsStandard5,388$98,91711.13.8%
60469PosenStandard5,205$73,6761.2-12.3%
60163BerkeleyStandard5,199$85,8231.5-0.4%
60461Olympia FieldsStandard4,761$124,4173.4-2.8%
60203EvanstonStandard4,680$170,2240.74.9%
60472RobbinsStandard4,563$40,6681.6-13.1%
60165Stone ParkStandard4,482$67,2240.3-9.6%
60195SchaumburgStandard4,397$90,1740.72.4%
60456HometownStandard4,215$61,1010.5-3.3%
60606ChicagoStandard3,840$128,6090.335.2%
60301Oak ParkStandard3,475$99,1670.159.8%
60043KenilworthStandard2,503$250,0010.6-5.5%
60476ThorntonStandard1,940$59,6473.2-31.4%
60602ChicagoStandard1,480$126,2020.13.6%
60603ChicagoStandard1,298$133,5450.129.5%
60604ChicagoStandard616$81,6580.147.0%
60029GolfPO Box518$242,7720.68.4%
60208EvanstonUnique2550.3
60141HinesPO Box195$18,7170.224.2%
60682ChicagoUnique0.0
60686ChicagoUnique0.0
60699ChicagoStandard0.0
60669ChicagoUnique0.0
60678ChicagoUnique0.0
60668ChicagoUnique0.0
60690ChicagoPO Box0.0
60674ChicagoUnique0.0
60685ChicagoUnique0.0
60675ChicagoUnique0.0
60691ChicagoPO Box0.0
60694ChicagoUnique0.0
60689ChicagoUnique0.0
60693ChicagoUnique0.0
60697ChicagoUnique0.0
60696ChicagoUnique0.0
60687ChicagoUnique0.0
60695ChicagoUnique0.0
60677ChicagoUnique0.0
60673ChicagoUnique0.0
60680ChicagoPO Box0.0
60684ChicagoUnique0.0
60664ChicagoPO Box0.0
60681ChicagoPO Box0.0
60303Oak ParkPO Box0.0
60161Melrose ParkPO Box0.0
60412Chicago HeightsPO Box0.0
60499Bedford ParkPO Box0.0
60454Oak LawnPO Box0.0
60670ChicagoUnique0.0
60196SchaumburgUnique0.7
60179Hoffman EstatesUnique0.1
60006Arlington HeightsPO Box0.0
60095PalatinePO Box0.0
60055PalatineUnique0.0
60094PalatinePO Box0.0
60038PalatineUnique0.0
60065NorthbrookPO Box0.0
60078PalatinePO Box0.0
60082TechnyPO Box0.0
60204EvanstonPO Box0.0
60159SchaumburgPO Box0.0
60019Des PlainesUnique0.0
60168SchaumburgPO Box0.0
60017Des PlainesPO Box0.0
60009Elk Grove VillagePO Box0.0
60688ChicagoUnique0.3
60701ChicagoStandard0.0
60666ChicagoPO Box9.2

Adjacent & Nearby Counties