56 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Carlinville township | 1 | 6,266 | 6,487 | -0.43% | 177 | 35.36 | Township |
| Carlinville | 2 | 5,427 | 5,686 | -0.95% | 1,611 | 3.37 | City |
| Staunton township | 3 | 5,357 | 5,479 | -0.3% | 296 | 18.12 | Township |
| Staunton | 4 | 4,887 | 5,046 | -0.65% | 1,219 | 4.01 | City |
| Brighton township | 5 | 3,826 | 3,899 | -0.08% | 106 | 36.09 | Township |
| Gillespie township | 6 | 3,558 | 3,651 | -0.42% | 100 | 35.66 | Township |
| Virden township | 7 | 3,279 | 3,346 | -0.12% | 182 | 17.98 | Township |
| Virden | 8 | 3,129 | 3,224 | -0.6% | 1,656 | 1.89 | City |
| Bunker Hill township | 9 | 3,100 | 3,155 | -0.1% | 86 | 36.20 | Township |
| Cahokia township | 10 | 3,085 | 3,179 | -0.36% | 84 | 36.60 | Township |
| Gillespie | 11 | 3,077 | 3,164 | -0.55% | 2,073 | 1.48 | City |
| Mount Olive township | 12 | 3,035 | 3,117 | -0.3% | 168 | 18.02 | Township |
| Piasa township | 13 | 2,970 | 3,164 | -1.23% | 82 | 36.35 | Township |
| Palmyra township | 14 | 2,827 | 2,891 | -0.74% | 81 | 34.83 | Township |
| Brighton | 15 | 2,135 | 2,212 | -0.7% | 1,111 | 1.92 | Village |
| Girard township | 16 | 2,102 | 2,152 | -0.24% | 116 | 18.07 | Township |
| Mount Olive | 17 | 1,925 | 2,015 | -0.93% | 1,670 | 1.15 | City |
| Girard | 18 | 1,725 | 1,780 | -0.63% | 1,847 | 0.93 | City |
| Bunker Hill | 19 | 1,577 | 1,624 | -0.57% | 1,231 | 1.28 | City |
| Dorchester township | 20 | 1,455 | 1,498 | -0.41% | 40 | 35.98 | Township |
| Benld | 21 | 1,388 | 1,465 | -1.07% | 1,309 | 1.06 | City |
| Shipman township | 22 | 1,271 | 1,301 | -0.24% | 35 | 35.81 | Township |
| North Palmyra township | 23 | 807 | 813 | 0.25% | 22 | 36.16 | Township |
| North Otter township | 24 | 755 | 770 | -0.13% | 21 | 35.71 | Township |
| Chesterfield township | 25 | 702 | 714 | 0% | 20 | 35.81 | Township |
| South Palmyra township | 26 | 655 | 664 | 0% | 18 | 36.16 | Township |
| Brushy Mound township | 27 | 652 | 661 | 0% | 18 | 35.32 | Township |
| Palmyra | 28 | 589 | 603 | -0.51% | 590 | 1 | Village |
| Hillyard township | 29 | 581 | 581 | 0.35% | 16 | 36.09 | Township |
| Polk township | 30 | 574 | 583 | 0% | 16 | 35.95 | Township |
| Nilwood township | 31 | 564 | 578 | -0.35% | 15 | 36.46 | Township |
| Wilsonville | 32 | 521 | 536 | -0.57% | 545 | 0.96 | Village |
| Shipman | 33 | 496 | 510 | -0.6% | 376 | 1.32 | Town |
| Shaws Point township | 34 | 467 | 474 | 0% | 14 | 34.08 | Township |
| South Otter township | 35 | 438 | 452 | -0.45% | 12 | 35.75 | Township |
| Prairietown | 36 | 419 | 298 | 7.16% | 2,229 | 0.19 | CDP |
| Mount Clare | 37 | 307 | 316 | -0.65% | 200 | 1.54 | Village |
| Barr township | 38 | 302 | 310 | -0.66% | 8 | 36.65 | Township |
| Bird township | 39 | 286 | 293 | -0.35% | 8 | 36.17 | Township |
| Scottville township | 40 | 271 | 278 | -0.37% | 7 | 36.74 | Township |
| East Gillespie | 41 | 258 | 268 | -0.77% | 809 | 0.32 | Village |
| Sawyerville | 42 | 257 | 266 | -0.77% | 260 | 0.99 | Village |
| Western Mound township | 43 | 249 | 249 | 0.4% | 7 | 35.03 | Township |
| White City | 44 | 220 | 212 | 0.92% | 182 | 1.21 | Village |
| Lake Ka-Ho | 45 | 196 | 195 | 0% | 690 | 0.28 | Village |
| Nilwood | 46 | 195 | 200 | -0.51% | 419 | 0.47 | Town |
| Modesto | 47 | 179 | 179 | 0% | 320 | 0.56 | Village |
| Williamson | 48 | 174 | 181 | -0.57% | 149 | 1.17 | Village |
| Honey Point township | 49 | 171 | 172 | 0.59% | 5 | 37.02 | Township |
| Royal Lakes | 50 | 170 | 165 | 0.59% | 365 | 0.47 | Village |
| Chesterfield | 51 | 163 | 168 | -0.61% | 301 | 0.54 | Village |
| Hettick | 52 | 139 | 146 | -0.71% | 381 | 0.36 | Village |
| Standard City | 53 | 125 | 132 | -0.79% | 197 | 0.64 | Village |
| Dorchester | 54 | 122 | 129 | -0.81% | 169 | 0.72 | Village |
| Eagarville | 55 | 108 | 113 | -0.92% | 119 | 0.91 | Village |
| Scottville | 56 | 92 | 97 | -1.08% | 92 | 1 | Village |
Carlinville township is the largest city in Macoupin County, with a population of 6,266.
Scottville is the smallest city in Macoupin County.
There are 56 cities in Macoupin County, Illinois.