There are 16 zip codes in Adams County, Illinois. The most populated is 62301, located in Quincy. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
6230130,944Quincy
6230519,473Quincy
623202,557Camp Point
623471,999Liberty
623511,934Mendon
623601,898Payson
623241,398Clayton
623761,106Ursa
623381,010Fowler
623391,005Golden
62349680Loraine
62325471Coatsburg
62365406Plainville
62348219Lima
62346128La Prairie
62359126Paloma
showing: 16 rows

Zip Codes in Adams County, Illinois by Population (2024)