RANKING · 2025 ESTIMATES · 11 SHOWN OF 11

Largest by population, Delaware cities

The most populous Delaware cities as of the 2025 population estimates. This list covers the 11 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 population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 2000

01Wilmington, DEDE73,512+1%

02Dover, DEDE40,592+26%

03Newark, DEDE30,359+6%

04Middletown, DEDE25,798+319%

05Milford, DEDE14,723+119%

06Smyrna, DEDE13,340+135%

07Seaford, DEDE9,165+37%

08Georgetown, DEDE8,291+79%

09Millsboro, DEDE7,890+234%

10Elsmere, DEDE6,196+7%

11New Castle, DEDE5,726+18%

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES