US ZIP Code Map

City

Seneca, IL ZIP codes

3 ZIPs, including 61360 as primary city.

ACS population

31,487

Median household income

$84,916

Median home value

$228,933

Map of Seneca

ZIP code map

ZIP share of this city

Population share

ZIP codes in Seneca

ZIPCityCountyPopulationIncome
60450MorrisGrundy County20,918$81,716
61341MarseillesLaSalle County7,249$78,895
61360SenecaLaSalle County3,320$94,137