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 |
|---|---|---|---|---|---|---|---|
| Elgin | 1 | 112,874 | 114,617 | -0.39% | 2,959 | 38.1 | City |
| Carpentersville | 2 | 36,829 | 37,909 | -0.73% | 4,683 | 7.9 | Village |
| St. Charles | 3 | 32,527 | 33,034 | -0.39% | 2,250 | 14.5 | City |
| Batavia | 4 | 26,208 | 26,316 | -0.1% | 2,409 | 10.9 | City |
| South Elgin | 5 | 24,418 | 23,852 | 0.58% | 3,360 | 7.3 | Village |
| Geneva | 6 | 21,055 | 21,350 | -0.35% | 2,111 | 10.0 | City |
| North Aurora | 7 | 19,267 | 18,285 | 1.29% | 2,542 | 7.6 | Village |
| Campton Hills | 8 | 10,767 | 10,877 | -0.26% | 637 | 16.9 | Village |
| Boulder Hill | 9 | 9,787 | 9,081 | 1.24% | 6,713 | 1.5 | CDP |
| Sugar Grove | 10 | 9,193 | 9,259 | -0.18% | 870 | 10.6 | Village |
| Gilberts | 11 | 8,904 | 8,374 | 1.5% | 1,622 | 5.5 | Village |
| Hampshire | 12 | 8,232 | 7,646 | 1.81% | 856 | 9.6 | Village |
| West Dundee | 13 | 7,881 | 7,868 | 0.04% | 1,975 | 4.0 | Village |
| Elburn | 14 | 6,676 | 6,208 | 1.78% | 1,780 | 3.8 | Village |
| Sleepy Hollow | 15 | 3,108 | 3,199 | -0.73% | 1,550 | 2.0 | Village |
| Prestbury | 16 | 2,163 | 1,978 | 1.45% | 3,455 | 0.6 | CDP |
| Maple Park | 17 | 1,493 | 1,432 | 1.01% | 652 | 2.3 | Village |
| Big Rock | 18 | 1,077 | 1,105 | -0.65% | 249 | 4.3 | Village |
| Burlington | 19 | 519 | 535 | -0.77% | 76 | 6.9 | Village |
| Kaneville | 20 | 442 | 453 | -0.67% | 1,551 | 0.3 | 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.
Elgin is the largest city in Kane County.
Kaneville is the smallest city in Kane County.
There are 20 cities in Kane County, Illinois.