RANKING · 2020 CENSUS · 21 SHOWN OF 21

Most population gained, Delaware cities · 2020

Delaware cities that added the most residents from the 2010 census to 2020, by raw count of people rather than percentage. This list covers the 21 cities in Delaware that qualify, ranked against each other statewide. The median across all 21 is +712.

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SAME RANKING BYCounties States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2024

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Middletown, DEDE25,798+4,321+86%

02Bear, DEDE22,370+3,689–

03Dover, DEDE40,592+3,356−27%

04Millsboro, DEDE7,890+2,986+316%

05Smyrna, DEDE13,340+2,860+538%

06Claymont, DEDE8,786+1,642−383%

07Milford, DEDE14,723+1,631+161%

08Seaford, DEDE9,165+1,029+2%

09Glasgow, DEDE15,546+985–

10Edgemoor, DEDE6,349+958+589%

11Georgetown, DEDE8,291+712−22%

12Brookside, DEDE15,115+621−224%

13Pike Creek Valley, DEDE12,431+475–

14Wilmington Manor, DEDE8,214+273−189%

15New Castle, DEDE5,726+266+964%

16Elsmere, DEDE6,196+98−173%

17North Star, DEDE7,834+76–

18Wilmington, DEDE73,512+47−96%

19Hockessin, DEDE13,439-49–

20Pike Creek, DEDE7,129-90−101%

21Newark, DEDE30,359-853−125%

SHOWING 1–21 OF 21

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