RANKING · 2020 CENSUS · 21 SHOWN OF 21

Largest by population, Delaware cities · 2020

The most populous Delaware cities as of the 2020 population estimates. This list covers the 21 cities in Delaware that qualify, ranked against each other statewide. The median across all 21 is 11,190.

DelawareAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros ZIP codes

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 2000

01Wilmington, DEDE70,898−2%

02Dover, DEDE39,403+23%

03Newark, DEDE30,601+7%

04Middletown, DEDE23,192+276%

05Bear, DEDE23,060+31%

06Glasgow, DEDE15,288+19%

07Brookside, DEDE14,974+1%

08Hockessin, DEDE13,478+4%

09Smyrna, DEDE12,883+127%

10Pike Creek Valley, DEDE11,692–

11Milford, DEDE11,190+66%

12Claymont, DEDE9,895+7%

13Wilmington Manor, DEDE8,162−1%

14North Star, DEDE8,056−3%

15Seaford, DEDE7,957+19%

16Pike Creek, DEDE7,808−60%

17Georgetown, DEDE7,134+54%

18Millsboro, DEDE6,863+191%

19Edgemoor, DEDE6,635+11%

20Elsmere, DEDE6,229+7%

21New Castle, DEDE5,551+14%

SHOWING 1–21 OF 21

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS