Jefferson 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
Mount Vernon114,14414,556-0.72%96614.6City
Ina21,6541,6490.06%6882.4Village
Bluford3604622-0.82%3811.6Village
Woodlawn4599613-0.66%7030.9Village
Dix5456466-0.65%2202.1Village
Waltonville6403414-0.74%3251.2Village
Bonnie7364375-0.82%2851.3Village
Belle Rive8300308-0.66%2921.0Village
Opdyke92603030.39%4920.5CDP
Nason10198201-0.5%2170.9City

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 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 10 cities in Jefferson County, Illinois.

Frequently Asked Questions