Janesville, IL ZIP codes

1 ZIP/ZCTA intersecting this Census place (CDP) in Coles County.

ACS 2023 population

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place Janesville (GEOID 1738232). Methodology

Combined population of ZIP/ZCTAs intersecting this place: 1,092 (1 ZIPs).

Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology

Map of Janesville, IL

Census place boundary and intersecting ZIP Code Tabulation Areas for Janesville, IL — Census place boundary for Janesville, IL. Intersecting ZCTAs may extend past the city limit. Not a USPS city limit. Boundaries: U.S. Census Bureau. Methodology · Data sources

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ZIP/ZCTA overlap with Janesville

Population overlap

Share of each ZIP/ZCTA’s population located within Janesville, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.

624406.8%

ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

ZIP codes intersecting Janesville

ZIP	City	County	Population	Income
62440	Lerna	Coles County	1,092	$72,583

USPS associates these ZIPs with Janesville

These codes list Janesville as a primary or acceptable city. They are not used for the ACS headline.

ZIP	City	County	Population	Income
62435	Janesville	Coles County	65	—