Cities in Alexander County, Illinois by Population (2024)

There are 9 cities in Alexander County, Illinois.

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.)

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Jonesboro1Illinois1,6231,702-1.22%6012.70
Cairo2Illinois1,5051,716-3.4%2156.99
Olive Branch3Illinois546610-2.85%589.45
Ullin4Illinois443466-1.34%1582.81
Tamms5Illinois369420-3.4%1582.33
East Cape Girardeau6Illinois250285-3.48%1271.96
McClure7Illinois221253-3.49%1451.53
Thebes8Illinois180204-3.23%1031.75
Unity9Illinois4662-8%660.70

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 Alexander County, Illinois?

Jonesboro is the largest city in Alexander County.

What is the smallest city in Alexander County, Illinois?

Unity is the smallest city in Alexander County.

How many cities are in Alexander County?

There are 9 cities in Alexander County, Illinois.

Frequently Asked Questions