Alexander County, Illinois Cities (2026)

6 cities

City
Rank
2026 Pop. ↓
2020 Pop.
Annual Change
Density
Area (mi²)
Type
Cairo11,4261,716-3.26%2047 City
Unity21,3701,406-0.58%2848 Township
Tamms3350419-3.05%1502 Village
East Cape Girardeau4236286-3.28%1202 Village
McClure5210252-3.23%1372 Village
Thebes6170205-3.41%972 Village

Alexander County Cities Summary

Largest City

Cairo is the largest city in Alexander County, with a population of 1,426.

Smallest City

Thebes is the smallest city in Alexander County, with a population of 170.

10 Largest Cities

There are 6 cities in Alexander County, Illinois.

Location of Alexander County