51 cities
| City | Rank | Annual Change ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| St. Georges | 1 | 7.17% | 1,630 | 1,045 |
| Cheswold | 2 | 5.91% | 2,687 | 1,934 |
| Milford | 3 | 4.92% | 14,771 | 11,310 |
| Ocean View | 4 | 2.98% | 3,113 | 2,663 |
| Millville | 5 | 2.94% | 2,170 | 1,857 |
| Millsboro | 6 | 2.92% | 8,094 | 6,943 |
| Milton | 7 | 2.89% | 3,882 | 3,335 |
| Clayton | 8 | 2.88% | 4,641 | 3,989 |
| Selbyville | 9 | 2.86% | 3,379 | 2,907 |
| Bridgeville | 10 | 2.85% | 2,992 | 2,574 |
| Laurel | 11 | 2.82% | 4,519 | 3,896 |
| Georgetown | 12 | 2.79% | 8,324 | 7,193 |
| Rehoboth Beach | 13 | 2.78% | 1,292 | 1,115 |
| Blades | 14 | 2.78% | 1,367 | 1,179 |
| Camden | 15 | 2.77% | 4,307 | 3,726 |
| Seaford | 16 | 2.7% | 9,194 | 7,982 |
| Long Neck | 17 | 2.67% | 3,234 | 2,869 |
| Delmar | 18 | 2.59% | 2,337 | 2,040 |
| Lewes | 19 | 2.57% | 3,797 | 3,320 |
| Middletown | 20 | 2.23% | 26,259 | 23,392 |
| Wyoming | 21 | 2.19% | 1,912 | 1,707 |
| Townsend | 22 | 1.67% | 2,990 | 2,743 |
| Claymont | 23 | 1.54% | 10,676 | 9,343 |
| Greenville | 24 | 1.41% | 2,948 | 2,448 |
| Rising Sun-Lebanon | 25 | 1.32% | 4,227 | 4,170 |
| Bear | 26 | 1.3% | 23,995 | 21,397 |
| Felton | 27 | 1.02% | 1,389 | 1,319 |
| Edgemoor | 28 | 1.01% | 6,687 | 6,483 |
| Harrington | 29 | 0.99% | 3,973 | 3,778 |
| Highland Acres | 30 | 0.91% | 4,000 | 3,913 |
| Frederica | 31 | 0.88% | 1,141 | 1,090 |
| Kent Acres | 32 | 0.88% | 2,182 | 1,832 |
| Wilmington | 33 | 0.8% | 73,759 | 70,842 |
| New Castle | 34 | 0.75% | 5,758 | 5,543 |
| Smyrna | 35 | 0.67% | 13,415 | 12,967 |
| Delaware City | 36 | 0.62% | 1,945 | 1,883 |
| Glasgow | 37 | 0.59% | 15,681 | 15,399 |
| Dover | 38 | 0.49% | 40,387 | 39,407 |
| Bellefonte | 39 | 0.48% | 1,255 | 1,225 |
| North Star | 40 | 0.39% | 8,468 | 7,546 |
| Wilmington Manor | 41 | 0.37% | 8,353 | 8,335 |
| Hockessin | 42 | 0.22% | 13,966 | 14,172 |
| Pike Creek Valley | 43 | 0.17% | 11,511 | 11,346 |
| Elsmere | 44 | 0.03% | 6,236 | 6,223 |
| Brookside | 45 | -0.01% | 14,325 | 13,741 |
| Newark | 46 | -0.08% | 30,483 | 30,598 |
| 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 | -1.38% | 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 Cheswold (5.91%) and Milford (4.92%). The largest population centers are Wilmington (73,759), Dover (40,387), and Newark (30,483). Of the 51 cities over 1,000 population, 44 are growing while 7 experienced population decline. Overall, cities averaged 1.58% annualized growth, with total urban population growing by 6.76% annually.