5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lawrenceville | 1 | 4,376 | 4,193 | 0.71% | 2,022 | 2 | City |
| Sumner | 2 | 2,575 | 2,638 | -0.39% | 1,842 | 1 | City |
| Bridgeport | 3 | 1,628 | 1,802 | -1.75% | 1,519 | 1 | City |
| St. Francisville | 4 | 506 | 569 | -1.94% | 679 | 1 | City |
| Russellville | 5 | 84 | 95 | -2.33% | 210 | 0 | Village |
Lawrenceville is the largest city in Lawrence County, with a population of 4,376.
Russellville is the smallest city in Lawrence County, with a population of 84.
There are 5 cities in Lawrence County, Illinois.