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

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