RANKING · 2025 ACS · 11 SHOWN OF 11

Most densely populated, Delaware cities

Delaware cities ranked by residents per square mile (2023). This list covers the 11 cities in Delaware that qualify, ranked against each other statewide.

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DelawareAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most sparsely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Wilmington, DEDE73,5126,747+1%

02Elsmere, DEDE6,1966,278+7%

03Newark, DEDE30,3593,204+6%

04Smyrna, DEDE13,3402,081+135%

05Middletown, DEDE25,7982,035+319%

06Seaford, DEDE9,1651,796+37%

07Dover, DEDE40,5921,704+26%

08Georgetown, DEDE8,2911,651+79%

09New Castle, DEDE5,7261,646+18%

10Millsboro, DEDE7,8901,544+234%

11Milford, DEDE14,7231,494+119%

SHOWING 1–11 OF 11

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