Carroll 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
Savanna12,6912,774-0.77%1,0292.6City
Thomson21,5971,611-0.25%7202.2Village
Lanark31,4551,498-0.75%1,2981.1City
Mount Carroll41,4291,475-0.83%7132.0City
Milledgeville59951,023-0.7%1,4420.7Village
Lake Carroll68845007.67%6513.5CDP
Shannon78648001.89%1,7930.5Village
Chadwick8475482-0.42%1,5270.3Village

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 Carroll County, Illinois?

Savanna is the largest city in Carroll County.

What is the smallest city in Carroll County, Illinois?

Chadwick is the smallest city in Carroll County.

How many cities are in Carroll County?

There are 8 cities in Carroll County, Illinois.

Frequently Asked Questions