51 cities
| City | Rank | Change ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| St. Georges | 1 | 7.17% | 1,630 | 1,045 |
| Milford | 2 | 4.73% | 14,608 | 11,310 |
| Cheswold | 3 | 4.57% | 2,472 | 1,934 |
| Camden | 4 | 3.55% | 4,495 | 3,727 |
| Ocean View | 5 | 3.04% | 3,120 | 2,662 |
| Millville | 6 | 3.03% | 2,177 | 1,857 |
| Clayton | 7 | 3% | 4,671 | 3,990 |
| Millsboro | 8 | 2.94% | 8,099 | 6,943 |
| Milton | 9 | 2.93% | 3,897 | 3,342 |
| Blades | 10 | 2.93% | 1,372 | 1,179 |
| Bridgeville | 11 | 2.92% | 2,999 | 2,574 |
| Selbyville | 12 | 2.9% | 3,374 | 2,898 |
| Laurel | 13 | 2.89% | 4,529 | 3,894 |
| Rehoboth Beach | 14 | 2.87% | 1,292 | 1,112 |
| Georgetown | 15 | 2.84% | 8,332 | 7,184 |
| Wyoming | 16 | 2.81% | 1,975 | 1,707 |
| Seaford | 17 | 2.76% | 9,231 | 7,991 |
| Long Neck | 18 | 2.67% | 3,234 | 2,869 |
| Delmar | 19 | 2.59% | 2,334 | 2,038 |
| Lewes | 20 | 2.57% | 3,794 | 3,319 |
| Middletown | 21 | 2.13% | 26,112 | 23,386 |
| Claymont | 22 | 1.54% | 10,676 | 9,343 |
| Greenville | 23 | 1.41% | 2,948 | 2,448 |
| Rising Sun-Lebanon | 24 | 1.32% | 4,227 | 4,170 |
| Bear | 25 | 1.31% | 23,995 | 21,397 |
| Townsend | 26 | 1.01% | 2,890 | 2,744 |
| Edgemoor | 27 | 1.01% | 6,687 | 6,483 |
| Highland Acres | 28 | 0.91% | 4,000 | 3,913 |
| Frederica | 29 | 0.89% | 1,136 | 1,085 |
| Kent Acres | 30 | 0.88% | 2,182 | 1,832 |
| Felton | 31 | 0.88% | 1,380 | 1,319 |
| Smyrna | 32 | 0.8% | 13,491 | 12,956 |
| Harrington | 33 | 0.69% | 3,914 | 3,778 |
| Glasgow | 34 | 0.59% | 15,681 | 15,399 |
| Dover | 35 | 0.48% | 40,276 | 39,320 |
| North Star | 36 | 0.39% | 8,468 | 7,546 |
| Wilmington | 37 | 0.39% | 72,233 | 70,837 |
| Wilmington Manor | 38 | 0.37% | 8,353 | 8,335 |
| Delaware City | 39 | 0.37% | 1,918 | 1,885 |
| Bellefonte | 40 | 0.24% | 1,238 | 1,225 |
| Hockessin | 41 | 0.21% | 13,966 | 14,172 |
| Pike Creek Valley | 42 | 0.17% | 11,511 | 11,346 |
| New Castle | 43 | 0.05% | 5,555 | 5,540 |
| Brookside | 44 | -0.01% | 14,325 | 13,741 |
| Elsmere | 45 | -0.36% | 6,112 | 6,224 |
| Newark | 46 | -0.48% | 29,882 | 30,599 |
| Dover Base Housing | 47 | -0.5% | 3,215 | 3,620 |
| Riverview | 48 | -0.67% | 2,224 | 2,557 |
| Pike Creek | 49 | -1.13% | 6,744 | 6,987 |
| Rodney Village | 50 | -1.26% | 1,258 | 1,165 |
| Woodside East | 51 | -1.39% | 1,923 | 2,167 |
Delaware's cities with over 1,000 residents show varied growth patterns from 2020 to 2025. St. Georges leads with 7.17% annualized growth, followed by Milford (4.73%) and Cheswold (4.57%). The largest population centers are Wilmington (72,233), Dover (40,276), and Newark (29,882). Of the 51 cities over 1,000 population, 43 are growing while 8 experienced population decline. Overall, cities averaged 1.53% annualized growth, with total urban population growing by 6.1% annually.