Jersey County, Illinois Cities (2024)

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

City
Rank
2024 Pop.
2020 Pop.
Change
Density (/mi²)
Area (mi²)
Type
Jerseyville18,2438,323-0.24%1,5745.2City
Grafton28076385.49%2173.7City
Elsah3516523-0.39%4731.1Village
Medora4364374-0.82%9580.4Village
Fieldon5163175-1.81%8070.2Village
Fidelity698980%9700.1Village

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

What is the largest city in Jersey County, Illinois?

Jerseyville is the largest city in Jersey County.

What is the smallest city in Jersey County, Illinois?

Fidelity is the smallest city in Jersey County.

How many cities are in Jersey County?

There are 6 cities in Jersey County, Illinois.

Frequently Asked Questions