Alton, IL ZIP codes

4 ZIP/ZCTAs intersecting this Census place in Madison County.

ACS 2023 population

25,430

Median household income

$53,005

Median home value

$99,500

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place Alton (GEOID 1701114). Methodology

Combined population of ZIP/ZCTAs intersecting this place: 58,422 (4 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 Alton, IL

Census place boundary and intersecting ZIP Code Tabulation Areas for Alton, IL — Census place boundary for Alton, 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 Alton

Population overlap

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

6200281.6%
USPS primary city
6201820.0%
620240.0%
620352.3%

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 Alton

ZIP	City	County	Population	Income
62002	Alton	Madison County	30,036	$57,851
62018	Cottage Hills	Madison County	3,006	$41,750
62024	East Alton	Madison County	9,465	$60,775
62035	Godfrey	Madison County	15,915	$91,696