There are 11 cities in Jefferson County, Illinois.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Mount Vernon1Illinois13,87414,554-1.46%95214.58
Centralia2Illinois11,65112,151-1.19%1,4238.19
Ina3Illinois1,6551,650 6882.40
Bluford4Illinois592622-1.5%3821.55
Woodlawn5Illinois590612-1.17%6920.85
Dix6Illinois444466-1.55%2142.07
Waltonville7Illinois396412-1.25%3191.24
Bonnie8Illinois358375-1.38%2811.27
Belle Rive9Illinois293309-1.68%2861.03
Opdyke10Illinois259303 4910.53
Nason11Illinois195201-1.01%2140.91
showing: 11 rows

Cities in Jefferson County, Illinois by Population (2024)

What is the largest city in Jefferson County, Illinois?

Mount Vernon is the largest city in Jefferson County.

What is the smallest city in Jefferson County, Illinois?

Nason is the smallest city in Jefferson County.

How many cities are in Jefferson County?

There are 11 cities in Jefferson County, Illinois.

Frequently Asked Questions