There are 14 cities in Adams County, Illinois.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Quincy1Illinois38,51239,410-0.56%2,45115.71
Camp Point2Illinois1,1051,123-0.54%9741.13
Payson3Illinois9901,022-0.8%8461.17
Mendon4Illinois844869-0.71%9850.86
Golden5Illinois619645-1.12%9640.64
Clayton6Illinois610638-1.14%6900.88
Ursa7Illinois587607-0.84%8510.69
Liberty8Illinois515540-1.34%1,3170.39
Loraine9Illinois298300 3530.84
Plainville10Illinois261270-0.76%1,1110.23
Coatsburg11Illinois145150-0.69%1,0980.13
Lima12Illinois140147-1.41%1,0370.14
Columbus13Illinois111113 5070.22
La Prairie14Illinois3639-2.7%1870.19
showing: 14 rows

Cities in Adams County, Illinois by Population (2024)

What is the largest city in Adams County, Illinois?

Quincy is the largest city in Adams County.

What is the smallest city in Adams County, Illinois?

La Prairie is the smallest city in Adams County.

How many cities are in Adams County?

There are 14 cities in Adams County, Illinois.

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