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.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Carlinville | 1 | 5,479 | 5,686 | -0.94% | 1,626 | 3.4 | City |
| Staunton | 2 | 4,919 | 5,046 | -0.65% | 1,227 | 4.0 | City |
| Virden | 3 | 3,148 | 3,224 | -0.6% | 1,666 | 1.9 | City |
| Gillespie | 4 | 3,094 | 3,164 | -0.58% | 2,085 | 1.5 | City |
| Brighton | 5 | 2,150 | 2,212 | -0.74% | 1,119 | 1.9 | Village |
| Mount Olive | 6 | 1,943 | 2,015 | -0.92% | 1,685 | 1.2 | City |
| Girard | 7 | 1,736 | 1,780 | -0.63% | 1,859 | 0.9 | City |
| Bunker Hill | 8 | 1,586 | 1,624 | -0.63% | 1,238 | 1.3 | City |
| Benld | 9 | 1,403 | 1,465 | -1.13% | 1,324 | 1.1 | City |
| Palmyra | 10 | 592 | 603 | -0.5% | 593 | 1.0 | Village |
| Wilsonville | 11 | 524 | 536 | -0.57% | 548 | 1.0 | Village |
| Shipman | 12 | 499 | 510 | -0.6% | 378 | 1.3 | Town |
| Prairietown | 13 | 391 | 298 | 7.71% | 2,080 | 0.2 | CDP |
| Mount Clare | 14 | 309 | 316 | -0.64% | 201 | 1.5 | Village |
| East Gillespie | 15 | 260 | 268 | -0.76% | 815 | 0.3 | Village |
| Sawyerville | 16 | 259 | 266 | -0.77% | 262 | 1.0 | Village |
| White City | 17 | 218 | 212 | 0.46% | 180 | 1.2 | Village |
| Lake Ka-Ho | 18 | 196 | 195 | 0% | 690 | 0.3 | Village |
| Nilwood | 19 | 196 | 200 | -0.51% | 422 | 0.5 | Town |
| Modesto | 20 | 179 | 179 | 0% | 320 | 0.6 | Village |
| Williamson | 21 | 175 | 181 | -1.13% | 149 | 1.2 | Village |
| Royal Lakes | 22 | 169 | 165 | 0.6% | 363 | 0.5 | Village |
| Chesterfield | 23 | 164 | 168 | -0.61% | 303 | 0.5 | Village |
| Hettick | 24 | 140 | 146 | -1.41% | 384 | 0.4 | Village |
| Standard City | 25 | 126 | 132 | -1.56% | 198 | 0.6 | Village |
| Dorchester | 26 | 123 | 129 | -1.6% | 170 | 0.7 | Village |
| Eagarville | 27 | 109 | 113 | -0.91% | 120 | 0.9 | Village |
| Scottville | 28 | 93 | 97 | -1.06% | 93 | 1.0 | Village |
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.
Carlinville is the largest city in Macoupin County.
Scottville is the smallest city in Macoupin County.
There are 28 cities in Macoupin County, Illinois.