ZIP codes

ZIP codes in Kendall County, Illinois

Kendall County has 17 ZIP codes. 5 lie entirely inside it and 12 are shared with neighboring counties, so part of their land and their people are elsewhere. About 133,532 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 17; 2 more just touch the border (under 1% of their land)
Entirely inside: 5; 99% or more of their land
Shared with other counties: 12; Most with Will County (6)
Most populated ZIP: 60543; 43,047 people · Oswego
Least populated ZIP: 60536; 62 people · Millbrook
Largest ZIP by land: 60541; 83 sq mi · Lisbon

Map of the ZIP codes in Kendall 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 Kendall County

17 ZIP codes in Kendall County, IL, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
60431	Joliet	27,138	26%	≈ 622
60447	Minooka	16,102	73%	≈ 4,991
60450	Morris	20,783	2.2%	≈ 211
60503	Aurora	16,789	28%	≈ 4,232
60512	Yorkville	1,090	100%	1,090
60536	Millbrook	62	100%	62
60537	Millington	726	32%	≈ 312
60538	Montgomery	30,514	54%	≈ 22,387
60541	Lisbon	3,342	90%	≈ 3,027
60543	Oswego	43,047	99.2%	≈ 42,662
60544	Plainfield	27,306	26%	≈ 936
60545	Plano	14,392	100%	14,392
60548	Sandwich	11,721	12%	≈ 1,427
60554	Sugar Grove	12,081	1.8%	≈ 369
60560	Yorkville	28,795	100%	28,795
60585	Plainfield	25,960	12%	≈ 1,233
60586	Joliet	47,834	27%	≈ 6,039

They also touch the county with under 1% of their land, so they aren’t counted: 60504 and 60506.

ZIP codes shared with other counties

These 12 ZIP codes have part of their land in another county. The first figure is the share of their land in Kendall County; then, where the rest lies.

60431 (Joliet): 26% here; 74% in Will County.
60447 (Minooka): 73% here; 21% in Grundy County and 5.6% in Will County.
60450 (Morris): 2.2% here; 98% in Grundy County.
60503 (Aurora): 28% here; 72% in Will County.
60537 (Millington): 32% here; 68% in LaSalle County.
60538 (Montgomery): 54% here; 46% in Kane County.
60541 (Lisbon): 90% here; 9.3% in Grundy County.
60544 (Plainfield): 26% here; 74% in Will County.
60548 (Sandwich): 12% here; 54% in DeKalb County and 34% in LaSalle County.
60554 (Sugar Grove): 1.8% here; 98% in Kane County.
60585 (Plainfield): 12% here; 88% in Will County.
60586 (Joliet): 27% here; 73% in Will 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 Joliet (2), Plainfield (2), Yorkville (2), Aurora (1), Lisbon (1), and Millbrook (1); 14 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 604 and 605.

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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