5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Beardstown | 1 | 5,742 | 5,924 | -0.52% | 1,587 | 4 | City |
| Virginia | 2 | 1,451 | 1,507 | -0.62% | 1,202 | 1 | City |
| Ashland | 3 | 1,174 | 1,215 | -0.59% | 1,570 | 1 | Village |
| Chandlerville | 4 | 514 | 528 | -0.39% | 647 | 1 | Village |
| Arenzville | 5 | 354 | 366 | -0.56% | 461 | 1 | Village |
Beardstown is the largest city in Cass County, with a population of 5,742.
Arenzville is the smallest city in Cass County, with a population of 354.
There are 5 cities in Cass County, Illinois.