County ZIP codes · Illinois · FIPS 17031

Cook County, IL ZIP Codes

Cook County, Illinois has 227 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 177 residential and 50 for PO boxes or a single organization. 167 of the residential ones lie mainly in Cook County and 10 mainly in a neighboring county; 21 cross the county line. Median household income ranges from $31,905 in 60621 (Chicago) to $250,000 or more in 3 ZIP codes at the Census top code (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

Where are the ZIP codes of Cook County?

The residential ZIP codes of Cook County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

60621 · $32k 3 ZIP codes · $250k+

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $67,487 and $111,116. 3 report $250,000 or more, the Census top code.

They carry 105 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 177 residential ZIP codes in Cook County

167 ZIP codes lie mainly in Cook County; 10 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Cook County, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
60629	Chicago	108,324	15,369	$61k	$244k	100%
60618	Chicago	91,901	18,402	$106k	$563k	100%
60632	Chicago	89,107	11,962	$65k	$253k	100%
60647	Chicago	84,749	21,385	$107k	$586k	100%
60639	Chicago	84,240	16,977	$61k	$310k	100%
60804	Cicero	82,797	11,637	$71k	$249k	100%
60623	Chicago	81,277	15,116	$52k	$237k	100%
60608	Chicago	80,737	12,924	$73k	$359k	100%
60625	Chicago	76,760	20,399	$86k	$402k	100%
60617	Chicago	74,790	5,470	$52k	$181k	100%
60634	Chicago	73,885	10,393	$89k	$354k	100%
60657	Chicago	71,904	33,059	$111k	$538k	100%
60614	Chicago	70,693	21,941	$136k	$720k	100%
60641	Chicago	68,894	17,108	$84k	$391k	100%
60640	Chicago	65,445	27,719	$73k	$370k	100%
60620	Chicago	64,871	9,271	$48k	$198k	100%
60402	Berwyn	63,721	11,109	$78k	$295k	100%
60651	Chicago	63,335	18,289	$54k	$270k	100%
60609	Chicago	62,028	8,004	$59k	$268k	100%
60016	Des Plaines	60,898	5,023	$87k	$320k	100%
60628	Chicago	60,431	5,505	$55k	$170k	100%
60619	Chicago	59,503	9,718	$45k	$220k	100%
60638	Chicago	57,074	5,158	$91k	$299k	100%
60453	Oak Lawn	56,861	6,694	$84k	$281k	100%
60056	Mount Prospect	55,818	5,137	$102k	$397k	100%
60630	Chicago	55,486	11,703	$99k	$385k	100%
60622	Chicago	54,609	21,844	$136k	$638k	100%
60616	Chicago	54,308	14,292	$74k	$387k	100%
60637	Chicago	52,721	11,643	$44k	$257k	100%
60613	Chicago	52,244	22,442	$96k	$391k	100%
60411	Chicago Heights	52,175	1,700	$62k	$160k	100%
60004	Arlington Heights	51,835	4,662	$129k	$424k	100%
60120	Elgin	51,225	2,940	$82k	$242k	72%
60626	Chicago	49,662	28,941	$60k	$281k	100%
60645	Chicago	48,208	21,657	$76k	$328k	100%
60649	Chicago	48,056	13,275	$44k	$213k	100%
60644	Chicago	47,210	13,446	$41k	$239k	100%
60643	Chicago	45,942	6,246	$81k	$249k	100%
60010	Barrington	45,747	617	$178k	$638k	51%
60610	Chicago	44,883	40,362	$105k	$506k	100%
60201	Evanston	43,744	9,697	$91k	$591k	100%
60615	Chicago	42,975	19,632	$64k	$348k	100%
60660	Chicago	42,724	33,535	$68k	$309k	100%
60659	Chicago	41,728	17,681	$69k	$372k	100%
60025	Glenview	41,689	3,974	$127k	$521k	100%
60462	Orland Park	41,456	2,594	$97k	$349k	100%
60062	Northbrook	41,406	2,190	$143k	$633k	100%
60707	Elmwood Park	41,116	11,491	$85k	$332k	100%
60652	Chicago	41,074	8,490	$80k	$251k	100%
60193	Schaumburg	40,146	4,558	$96k	$330k	100%
60107	Streamwood	38,886	5,048	$101k	$271k	100%
60068	Park Ridge	38,650	5,287	$143k	$552k	100%
60090	Wheeling	38,298	4,263	$85k	$265k	100%
60067	Palatine	38,204	2,936	$125k	$427k	100%
60611	Chicago	37,705	47,547	$126k	$651k	100%
60074	Palatine	36,460	5,133	$84k	$316k	95%
60605	Chicago	36,210	25,322	$124k	$453k	100%
60477	Tinley Park	35,976	2,530	$95k	$275k	96%
60612	Chicago	35,744	9,611	$61k	$365k	100%
60624	Chicago	35,263	9,942	$34k	$231k	100%
60409	Calumet City	35,100	4,531	$55k	$145k	100%
60169	Hoffman Estates	33,401	4,359	$91k	$306k	100%
60653	Chicago	33,383	14,145	$41k	$361k	100%
60076	Skokie	32,953	6,417	$114k	$396k	100%
60302	Oak Park	32,862	11,121	$101k	$474k	100%
60007	Elk Grove Village	32,592	1,800	$94k	$347k	96%
60607	Chicago	32,392	14,004	$128k	$500k	100%
60202	Evanston	32,341	10,586	$99k	$398k	100%
60636	Chicago	32,198	8,228	$39k	$155k	100%
60525	La Grange	31,324	2,399	$117k	$438k	100%
60631	Chicago	30,924	8,255	$115k	$436k	100%
60714	Niles	30,305	4,826	$76k	$359k	100%
60656	Chicago	29,538	9,125	$96k	$349k	100%
60005	Arlington Heights	28,843	4,390	$100k	$390k	100%
60438	Lansing	28,806	3,573	$76k	$178k	100%
60646	Chicago	28,780	6,485	$113k	$504k	100%
60459	Burbank	28,739	6,872	$80k	$276k	100%
60077	Skokie	28,501	6,736	$79k	$356k	100%
60655	Chicago	28,434	6,451	$115k	$324k	100%
60621	Chicago	28,301	7,539	$32k	$154k	100%
60018	Des Plaines	27,952	1,686	$91k	$318k	100%
60091	Wilmette	27,333	5,119	$190k	$807k	100%
60452	Oak Forest	26,739	3,114	$93k	$256k	100%
60487	Tinley Park	26,043	3,484	$132k	$351k	59%
60654	Chicago	25,755	47,518	$147k	$500k	100%
60827	Riverdale	24,713	3,517	$37k	$154k	100%
60053	Morton Grove	24,619	4,867	$111k	$389k	100%
60160	Melrose Park	24,549	5,393	$66k	$276k	100%
60467	Orland Park	24,398	1,652	$115k	$412k	94%
60706	Harwood Heights	24,260	7,872	$85k	$358k	100%
60439	Lemont	24,192	814	$122k	$481k	67%
60426	Harvey	23,906	3,090	$42k	$91k	100%
60406	Blue Island	23,327	4,343	$57k	$175k	100%
60153	Maywood	23,201	8,172	$69k	$230k	100%
60008	Rolling Meadows	22,800	4,446	$94k	$318k	100%
60803	Alsip	22,106	2,851	$67k	$221k	100%
60642	Chicago	21,789	13,063	$143k	$594k	100%
60466	Park Forest	21,461	3,398	$62k	$115k	73%
60473	South Holland	21,225	2,706	$86k	$217k	100%
60164	Melrose Park	20,872	4,249	$81k	$258k	100%
60419	Dolton	20,825	4,905	$58k	$151k	100%
60443	Matteson	20,663	1,835	$92k	$234k	100%
60093	Winnetka	19,867	2,372	$250k+	$1.18M	100%
60430	Homewood	19,838	2,883	$97k	$221k	100%
60194	Schaumburg	19,756	5,355	$98k	$330k	100%
60805	Evergreen Park	19,420	5,698	$96k	$268k	100%
60513	Brookfield	19,343	6,131	$110k	$332k	100%
60104	Bellwood	18,256	7,993	$80k	$230k	100%
60465	Palos Hills	18,081	4,200	$84k	$279k	100%
60131	Franklin Park	18,054	3,321	$77k	$287k	100%
60304	Oak Park	16,955	10,939	$136k	$467k	100%
60455	Bridgeview	16,872	3,979	$67k	$237k	100%
60192	Hoffman Estates	16,461	1,477	$154k	$420k	100%
60154	Westchester	16,436	3,769	$99k	$327k	100%
60478	Country Club Hills	16,390	1,675	$75k	$192k	100%
60546	Riverside	16,322	4,095	$114k	$395k	100%
60070	Prospect Heights	15,496	3,897	$85k	$343k	100%
60601	Chicago	15,235	39,165	$122k	$526k	100%
60429	Hazel Crest	14,864	3,649	$67k	$184k	100%
60457	Hickory Hills	14,503	4,628	$77k	$288k	100%
60445	Midlothian	14,268	3,324	$71k	$208k	100%
60458	Justice	14,200	4,868	$61k	$225k	100%
60415	Chicago Ridge	14,099	6,222	$69k	$227k	100%
60026	Glenview	14,069	3,452	$138k	$694k	100%
60130	Forest Park	13,943	4,948	$77k	$305k	100%
60463	Palos Heights	13,722	2,606	$108k	$363k	100%
60173	Schaumburg	13,650	2,126	$104k	$372k	100%
60526	La Grange Park	13,459	3,467	$120k	$440k	100%
60558	Western Springs	13,446	4,728	$230k	$739k	100%
60712	Lincolnwood	13,112	4,871	$110k	$496k	100%
60471	Richton Park	12,848	3,237	$65k	$222k	96%
60633	Chicago	12,474	1,280	$63k	$187k	100%
60305	River Forest	11,992	4,841	$147k	$687k	100%
60501	Summit Argo	11,432	2,624	$63k	$234k	100%
60661	Chicago	11,398	37,248	$126k	$393k	100%
60176	Schiller Park	11,393	4,491	$70k	$275k	100%
60428	Markham	10,927	2,154	$60k	$136k	100%
60482	Worth	10,897	4,669	$56k	$209k	100%
60418	Crestwood	10,572	3,572	$76k	$195k	100%
60171	River Grove	10,451	4,641	$70k	$242k	100%
60534	Lyons	10,327	5,517	$71k	$257k	100%
60475	Steger	10,035	2,083	$68k	$159k	69%
60464	Palos Park	9,773	742	$126k	$460k	100%
60422	Flossmoor	9,542	2,396	$135k	$344k	100%
60425	Glenwood	8,714	1,548	$77k	$197k	100%
60022	Glencoe	8,352	2,203	$250k+	$1.39M	100%
60162	Hillside	8,084	2,547	$72k	$247k	100%
60155	Broadview	7,906	4,260	$65k	$252k	100%
60480	Willow Springs	5,388	479	$99k	$364k	100%
60469	Posen	5,205	4,590	$74k	$174k	100%
60163	Berkeley	5,199	4,126	$86k	$247k	100%
60461	Olympia Fields	4,761	1,414	$124k	$328k	100%
60203	Evanston	4,680	6,842	$170k	$468k	100%
60472	Robbins	4,563	2,700	$41k	$121k	100%
60165	Stone Park	4,482	13,105	$67k	$242k	100%
60195	Schaumburg	4,397	2,606	$90k	$319k	100%
60456	Hometown	4,215	8,800	$61k	$173k	100%
60606	Chicago	3,840	16,552	$129k	$416k	100%
60301	Oak Park	3,475	17,821	$99k	$247k	100%
60043	Kenilworth	2,503	4,124	$250k+	$1.56M	100%
60476	Thornton	1,940	586	$60k	$155k	100%
60602	Chicago	1,480	18,049	$126k	$392k	100%
60603	Chicago	1,298	10,908	$134k	$634k	100%
60604	Chicago	616	8,000	$82k	$597k	100%
60029	Golf	518	1,156	$243k	$955k	100%
60208	Evanston	255	1,197	–	–	100%
60141	Hines	195	464	$19k	–	100%

Partly in Cook County

Residential ZIP codes mainly in another county that reach at least 1% into Cook County, by their share here
						In this county
60133	Hanover Park	36,732	4,381	$92k	$274k	36%
60103	Bartlett	41,382	2,255	$134k	$379k	34%
60089	Buffalo Grove	42,872	4,356	$129k	$412k	22%
60527	Willowbrook	29,028	2,016	$107k	$502k	21%
60172	Roselle	24,141	3,450	$111k	$347k	17%
60521	Hinsdale	18,056	3,817	$249k	$1.03M	17%
60423	Frankfort	32,836	867	$137k	$398k	5%
60015	Deerfield	28,096	2,061	$183k	$606k	4%
60126	Elmhurst	47,516	4,240	$148k	$540k	3%
60449	Monee	9,477	192	$105k	$300k	1%

Download the 227 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

21 ZIP codes of Cook County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Cook County and in the neighboring counties
ZIP	In Cook	Elsewhere
60120	72%	Kane County 28%
60126	3%	DuPage County 97%
60010	51%	Lake County 38%; McHenry County 9%; Kane County 2%
60089	22%	Lake County 78%
60103	34%	DuPage County 66%
60133	36%	DuPage County 64%
60074	95%	Lake County 5%
60477	96%	Will County 4%
60423	5%	Will County 95%
60007	96%	DuPage County 4%
60527	21%	DuPage County 79%
60015	4%	Lake County 96%
60487	59%	Will County 41%
60467	94%	Will County 6%
60439	67%	DuPage County 24%; Will County 9%
60172	17%	DuPage County 83%
60466	73%	Will County 27%
60521	17%	DuPage County 83%
60471	96%	Will County 4%
60475	69%	Will County 31%
60449	1%	Will County 99%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

PO Box and single-organization ZIP codes

ZIP codes in Cook County without a residential area (GeoNames postal codes)
ZIP	Postal name
60006	Arlington Heights
60009	Elk Grove Village
60017	Des Plaines
60019	Des Plaines
60038	Palatine
60055	Palatine
60065	Northbrook
60078	Palatine
60082	Techny
60094	Palatine
60095	Palatine
60159	Schaumburg
60161	Melrose Park
60168	Schaumburg
60179	Hoffman Estates
60196	Schaumburg
60204	Evanston
60209	Evanston
60303	Oak Park
60412	Chicago Heights
60454	Oak Lawn
60499	Bedford Park
60664	Chicago
60666	Chicago
60668	Chicago
60669	Chicago
60670	Chicago
60673	Chicago
60674	Chicago
60675	Chicago
60677	Chicago
60678	Chicago
60680	Chicago
60681	Chicago
60682	Chicago
60684	Chicago
60685	Chicago
60686	Chicago
60687	Chicago
60688	Chicago
60689	Chicago
60690	Chicago
60691	Chicago
60693	Chicago
60694	Chicago
60695	Chicago
60696	Chicago
60697	Chicago
60699	Chicago
60701	Chicago

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Cook County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Cook County's ZIP codes use 9 prefixes: 600, 601, 602, 603, 604, 605, 606, 607 and 608.

Three-digit prefixes of Cook County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Cook County's
Prefix	Sectional center	Here	All codes
600	Palatine, IL (SCF 600)	37	82
601	Carol Stream, IL (SCF 601)	31	89
602	Palatine, IL (SCF 600)	6	6
603	Carol Stream, IL (SCF 601)	5	6
604	South Suburban, IL (SCF 604)	47	83
605	Fox Valley, IL (SCF 605)	9	65
606	Chicago, IL (SCF 606)	83	83
607	Chicago, IL (SCF 606)	5	5
608	Chicago, IL (SCF 606)	4	4

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.