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 |
|---|---|---|---|---|---|---|---|
| Dixon | 1 | 15,042 | 15,256 | -0.36% | 1,774 | 8.5 | City |
| Amboy | 2 | 2,223 | 2,275 | -0.58% | 358 | 6.2 | City |
| Ashton | 3 | 940 | 966 | -0.74% | 1,304 | 0.7 | Village |
| Franklin Grove | 4 | 873 | 897 | -0.68% | 2,099 | 0.4 | Village |
| Paw Paw | 5 | 805 | 827 | -0.74% | 1,344 | 0.6 | Village |
| Lost Nation | 6 | 731 | 570 | 0.14% | 299 | 2.4 | CDP |
| Como | 7 | 607 | 525 | 0.5% | 569 | 1.1 | CDP |
| Sublette | 8 | 372 | 379 | -0.53% | 930 | 0.4 | Village |
| Lee | 9 | 303 | 313 | -0.98% | 1,530 | 0.2 | Village |
| Grand Detour | 10 | 281 | 351 | -3.44% | 240 | 1.2 | CDP |
| Compton | 11 | 264 | 270 | -0.75% | 1,600 | 0.2 | Village |
| Steward | 12 | 223 | 227 | -0.45% | 1,689 | 0.1 | Village |
| Nachusa | 13 | 161 | 122 | 7.33% | 211 | 0.8 | CDP |
| Coleta | 14 | 159 | 163 | -0.63% | 430 | 0.4 | Village |
| West Brooklyn | 15 | 128 | 131 | -0.78% | 1,362 | 0.1 | Village |
| Nelson | 16 | 123 | 126 | -0.81% | 345 | 0.4 | Village |
| Harmon | 17 | 116 | 119 | -0.85% | 532 | 0.2 | 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.
Dixon is the largest city in Lee County.
Harmon is the smallest city in Lee County.
There are 17 cities in Lee County, Illinois.