RANKING · 2020 CENSUS · 21 SHOWN OF 21

Largest by population, Delaware cities · 2020

The most populous us cities as of the 2023 estimates. This list covers the 21 cities in Delaware that qualify, ranked against each other statewide.

DelawareAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPTOTAL POPULATIONVS 2000

01Wilmington, DEDE73,51270,898−2%

02Dover, DEDE40,59239,403+23%

03Newark, DEDE30,35930,601+7%

04Middletown, DEDE25,79823,192+276%

05Bear, DEDE22,37023,060+31%

06Glasgow, DEDE15,54615,288+19%

07Brookside, DEDE15,11514,974+1%

08Hockessin, DEDE13,43913,478+4%

09Smyrna, DEDE13,34012,883+127%

10Pike Creek Valley, DEDE12,43111,692–

11Milford, DEDE14,72311,190+66%

12Claymont, DEDE8,7869,895+7%

13Wilmington Manor, DEDE8,2148,162−1%

14North Star, DEDE7,8348,056−3%

15Seaford, DEDE9,1657,957+19%

16Pike Creek, DEDE7,1297,808−60%

17Georgetown, DEDE8,2917,134+54%

18Millsboro, DEDE7,8906,863+191%

19Edgemoor, DEDE6,3496,635+11%

20Elsmere, DEDE6,1966,229+7%

21New Castle, DEDE5,7265,551+14%

SHOWING 1–21 OF 21

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES