ZIP codes

ZIP codes in McHenry County, Illinois

McHenry County has 23 ZIP codes. 10 lie entirely inside it and 13 are shared with neighboring counties, so part of their land and their people are elsewhere. About 314,539 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 23; 1 more just touches the border (under 1% of their land)
Entirely inside: 10; 99% or more of their land
Shared with other counties: 13; Most with Lake County (6)
Most populated ZIP: 60014; 48,590 people · Crystal Lake
Least populated ZIP: 60072; 870 people · Ringwood
Largest ZIP by land: 60033; 117 sq mi · Harvard

Map of the ZIP codes in McHenry County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in McHenry County

23 ZIP codes in McHenry County, IL, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
60010	Barrington Hills	45,747	9.4%	≈ 4,219
60012	Crystal Lake	12,368	100%	12,368
60013	Cary	26,694	91%	≈ 25,294
60014	Crystal Lake	48,590	100%	48,590
60021	Fox River Grove	4,996	94%	≈ 4,558
60033	Harvard	12,999	94%	≈ 12,775
60034	Hebron	2,033	100%	2,033
60042	Island Lake	8,347	46%	≈ 5,342
60050	McHenry	31,781	99.5%	≈ 31,536
60051	Johnsburg	24,621	82%	≈ 20,821
60071	Richmond	3,851	100%	3,851
60072	Ringwood	870	100%	870
60081	Spring Grove	9,088	82%	≈ 6,677
60097	Wonder Lake	11,983	100%	11,983
60098	Woodstock	33,130	100%	33,130
60102	Algonquin	32,286	78%	≈ 25,515
60135	Genoa	7,274	2.2%	≈ 175
60140	Hampshire	22,689	1.2%	≈ 294
60142	Huntley	29,692	72%	≈ 21,640
60152	Marengo	12,417	98%	≈ 12,141
60156	Lake in the Hills	28,800	100%	28,800
60180	Union	1,831	100%	1,831
61038	Garden Prairie	1,274	7.2%	≈ 75

They also touch the county with under 1% of their land, so they aren’t counted: 60020.

ZIP codes shared with other counties

These 13 ZIP codes have part of their land in another county. The first figure is the share of their land in McHenry County; then, where the rest lies.

60010 (Barrington Hills): 9.4% here; 51% in Cook County, 38% in Lake County, and 1.7% in Kane County.
60013 (Cary): 91% here; 8.9% in Lake County.
60021 (Fox River Grove): 94% here; 6.2% in Lake County.
60033 (Harvard): 94% here; 5.9% in Boone County.
60042 (Island Lake): 46% here; 54% in Lake County.
60051 (Johnsburg): 82% here; 18% in Lake County.
60081 (Spring Grove): 82% here; 18% in Lake County.
60102 (Algonquin): 78% here; 22% in Kane County.
60135 (Genoa): 2.2% here; 96% in DeKalb County and 1.6% in Boone County.
60140 (Hampshire): 1.2% here; 95% in Kane County and 4.2% in DeKalb County.
60142 (Huntley): 72% here; 28% in Kane County.
60152 (Marengo): 98% here; 2.0% in DeKalb County.
61038 (Garden Prairie): 7.2% here; 93% in Boone County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Crystal Lake (2), Algonquin (1), Barrington Hills (1), Cary (1), Fox River Grove (1), and Garden Prairie (1); 22 places in all.

They start with 3 different three-digit prefixes, one per USPS sorting center: 600, 601, and 610.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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