| City | County | Population (2017) |
Land Ares Square Miles |
Density per Sq Mile |
|---|---|---|---|---|
| Wilmington | New Castle County | 70,166 | 11 | 6379 |
| Dover | Kent County | 38,166 | 24 | 1590 |
| Newark | New Castle County | 33,515 | 9 | 3724 |
| Middletown | New Castle County | 22,900 | 12 | 1908 |
| Bear | New Castle County | 20,401 | 6 | 3400 |
| Glasgow | New Castle County | 15,280 | 10 | 1528 |
| Hockessin | New Castle County | 13,672 | 10 | 1367 |
| Brookside | New Castle County | 13,554 | 4 | 3389 |
| Smyrna | Kent County / New Castle County | 11,813 | 6 | 1969 |
| Milford | Kent County / Sussex County | 11,732 | 10 | 1173 |
| Pike Creek Valley | New Castle County | 10,823 | 3 | 3608 |
| Pike Creek | New Castle County | 8,740 | 3 | 2913 |
| Claymont | New Castle County | 8,707 | 2 | 4354 |
| Seaford | Sussex County | 8,013 | 5 | 1603 |
| Wilmington Manor | New Castle County | 7,608 | 2 | 3804 |
| Georgetown | Sussex County | 7,563 | 5 | 1513 |
| North Star | New Castle County | 7,390 | 7 | 1056 |
| Edgemoor | New Castle County | 6,178 | 2 | 3089 |
| Elsmere | New Castle County | 5,872 | 1 | 5872 |
| New Castle | New Castle County | 5,392 | 3 | 1797 |
| Millsboro | Sussex County | 4,533 | 6 | 756 |
| Laurel | Sussex County | 4,356 | 3 | 1452 |
| Rising Sun-Lebanon | Kent County | 3,817 | 4 | 954 |
| Highland Acres | Kent County | 3,775 | 1 | 3775 |
| Harrington | Kent County | 3,638 | 3 | 1213 |
| Camden | Kent County | 3,551 | 4 | 888 |
| Clayton | Kent County / New Castle County | 3,508 | 2 | 1754 |
| Lewes | Sussex County | 3,322 | 4 | 831 |
| Dover Base Housing | Kent County | 3,200 | 1 | 3200 |
| Milton | Sussex County | 3,012 | 2 | 1506 |
| Riverview | Kent County | 2,728 | 4 | 682 |
| Long Neck | Sussex County | 2,716 | 2 | 1358 |
| Townsend | New Castle County | 2,659 | 1 | 2659 |
| Woodside East | Kent County | 2,569 | 2 | 1285 |
| Selbyville | Sussex County | 2,540 | 4 | 635 |
| Kent Acres | Kent County | 2,369 | 1 | 2369 |
| Bridgeville | Sussex County | 2,366 | 5 | 473 |
| Greenville | New Castle County | 2,305 | 3 | 768 |
| Ocean View | Sussex County | 2,190 | 3 | 730 |
| Delaware City | New Castle County | 1,837 | 2 | 919 |
| Delmar | Sussex County | 1,822 | 2 | 911 |
| Cheswold | Kent County | 1,695 | 2 | 848 |
| Wyoming | Kent County | 1,549 | 1 | 1549 |
| Rehoboth Beach | Sussex County | 1,546 | 1 | 1546 |
| Blades | Sussex County | 1,454 | 1 | 1454 |
| Felton | Kent County | 1,414 | 1 | 1414 |
| Bethany Beach | Sussex County | 1,245 | 1 | 1245 |
| Rodney Village | Kent County | 1,231 | 1 | 1231 |
| Bellefonte | New Castle County | 1,164 | 0 | 0 |
| Greenwood | Sussex County | 1,139 | 1 | 1139 |
| Newport | New Castle County | 1,039 | 0 | 0 |
| St. Georges | New Castle County | 1,033 | 1 | 1033 |
| Frankford | Sussex County | 987 | 1 | 987 |
| Dagsboro | Sussex County | 927 | 1 | 927 |
| Frederica | Kent County | 849 | 2 | 425 |
| Millville | Sussex County | 626 | 3 | 209 |
| South Bethany | Sussex County | 530 | 1 | 530 |
| Fenwick Island | Sussex County | 445 | 0 | 0 |
| Arden | New Castle County | 440 | 0 | 0 |
| Ellendale | Sussex County | 434 | 0 | 0 |
| Houston | Kent County | 405 | 0 | 0 |
| Dewey Beach | Sussex County | 400 | 0 | 0 |
| Bowers | Kent County | 374 | 0 | 0 |
| Odessa | New Castle County | 360 | 1 | 360 |
| Magnolia | Kent County | 289 | 0 | 0 |
| Kenton | Kent County | 271 | 0 | 0 |
| Ardentown | New Castle County | 270 | 0 | 0 |
| Slaughter Beach | Sussex County | 241 | 1 | 241 |
| Little Creek | Kent County | 235 | 0 | 0 |
| Ardencroft | New Castle County | 216 | 0 | 0 |
| Leipsic | Kent County | 205 | 0 | 0 |
| Bethel | Sussex County | 201 | 0 | 0 |
| Woodside | Kent County | 193 | 0 | 0 |
| Viola | Kent County | 165 | 0 | 0 |
| Henlopen Acres | Sussex County | 144 | 0 | 0 |
| Farmington | Kent County | 122 | 0 | 0 |
| Totals: | 414,136 |
