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 |
|---|---|---|---|---|---|---|---|
| Dover | 1 | 40,085 | 39,320 | 0.48% | 1,683 | 23.8 | City |
| Milford | 2 | 13,948 | 11,310 | 4.96% | 1,415 | 9.9 | City |
| Smyrna | 3 | 13,384 | 12,956 | 0.81% | 2,088 | 6.4 | Town |
| Clayton | 4 | 4,535 | 3,990 | 3.09% | 2,328 | 1.9 | Town |
| Camden | 5 | 4,341 | 3,727 | 3.65% | 1,159 | 3.7 | Town |
| Rising Sun-Lebanon | 6 | 4,172 | 4,170 | 1.36% | 1,167 | 3.6 | CDP |
| Highland Acres | 7 | 3,964 | 3,913 | 0.92% | 2,657 | 1.5 | CDP |
| Harrington | 8 | 3,887 | 3,778 | 0.7% | 1,427 | 2.7 | City |
| Dover Base Housing | 9 | 3,231 | 3,620 | -0.46% | 4,302 | 0.8 | CDP |
| Cheswold | 10 | 2,364 | 1,934 | 4.74% | 1,286 | 1.8 | Town |
| Riverview | 11 | 2,239 | 2,557 | -0.66% | 620 | 3.6 | CDP |
| Kent Acres | 12 | 2,163 | 1,832 | 0.89% | 2,548 | 0.8 | CDP |
| Woodside East | 13 | 1,950 | 2,167 | -1.32% | 1,138 | 1.7 | CDP |
| Wyoming | 14 | 1,921 | 1,707 | 2.84% | 1,835 | 1.0 | Town |
| Felton | 15 | 1,368 | 1,319 | 0.89% | 1,736 | 0.8 | Town |
| Rodney Village | 16 | 1,274 | 1,165 | -1.16% | 2,163 | 0.6 | CDP |
| Frederica | 17 | 1,126 | 1,085 | 0.9% | 647 | 1.7 | Town |
| Greenwood | 18 | 1,121 | 992 | 2.94% | 1,412 | 0.8 | Town |
| Houston | 19 | 401 | 389 | 0.75% | 1,047 | 0.4 | Town |
| Bowers | 20 | 288 | 275 | 1.05% | 926 | 0.3 | Town |
| Magnolia | 21 | 287 | 279 | 0.7% | 1,464 | 0.2 | Town |
| Slaughter Beach | 22 | 248 | 219 | 2.9% | 175 | 1.4 | Town |
| Kenton | 23 | 228 | 218 | 0.89% | 1,295 | 0.2 | Town |
| Little Creek | 24 | 202 | 194 | 1% | 2,040 | 0.1 | Town |
| Woodside | 25 | 196 | 190 | 0.51% | 1,167 | 0.2 | Town |
| Leipsic | 26 | 186 | 180 | 0.54% | 626 | 0.3 | Town |
| Viola | 27 | 148 | 142 | 0.68% | 836 | 0.2 | Town |
| Farmington | 28 | 101 | 91 | 2.02% | 1,384 | 0.1 | Town |
| Hartly | 29 | 79 | 71 | 2.6% | 1,386 | 0.1 | Town |
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.
Dover is the largest city in Kent County.
Hartly is the smallest city in Kent County.
There are 29 cities in Kent County, Delaware.