RANKING · 2020 CENSUS · 21 SHOWN OF 21

Most population lost, Delaware cities · 2020

Delaware cities that lost 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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DelawareAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

YEAR2000 2010 2020 2024

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Newark, DEDE30,359-853−125%

02Pike Creek, DEDE7,129-90−101%

03Hockessin, DEDE13,439-49–

04Wilmington, DEDE73,512+47−96%

05North Star, DEDE7,834+76–

06Elsmere, DEDE6,196+98−173%

07New Castle, DEDE5,726+266+964%

08Wilmington Manor, DEDE8,214+273−189%

09Pike Creek Valley, DEDE12,431+475–

10Brookside, DEDE15,115+621−224%

11Georgetown, DEDE8,291+712−22%

12Edgemoor, DEDE6,349+958+589%

13Glasgow, DEDE15,546+985–

14Seaford, DEDE9,165+1,029+2%

15Milford, DEDE14,723+1,631+161%

16Claymont, DEDE8,786+1,642−383%

17Smyrna, DEDE13,340+2,860+538%

18Millsboro, DEDE7,890+2,986+316%

19Dover, DEDE40,592+3,356−27%

20Bear, DEDE22,370+3,689–

21Middletown, DEDE25,798+4,321+86%

SHOWING 1–21 OF 21

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