RANKING · 2025 ESTIMATES · 20 SHOWN OF 20

Most densely populated, Maine cities

Maine cities ranked by residents per square mile (2025). This list covers the 20 cities in Maine that qualify, ranked against each other statewide. The median across all 20 is 556. Biggest climber in the top 100 since 2020: Auburn, ME, up 14 places to #13.

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MaineAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

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

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Portland, MEME69,9113,246+9%

02South Portland, MEME27,0072,242+16%

03▲4Waterville, MEME17,5791,299+13%

04▲2Westbrook, MEME21,5651,255+34%

05▲4Lewiston, MEME38,8661,138+9%

06▲6Bath, MEME8,835969−5%

07▲6Bangor, MEME32,518949+3%

08▲11Biddeford, MEME22,399745+7%

09▲11Brewer, MEME9,636632+7%

10▲12Rockland, MEME7,142556−6%

11▲12Saco, MEME21,159548+26%

12▲13Sanford, MEME22,663474+124%

13▲14Auburn, MEME25,441429+10%

14▲14Gardiner, MEME6,2063960%

15▲14Augusta, MEME19,155347+3%

16▲14Belfast, MEME6,988205+10%

17▲14Old, MEME7,589196−7%

18▲14Presque Isle, MEME8,694115−9%

19▲14Ellsworth, MEME8,862112+37%

20▲14Caribou, MEME7,32192−12%

SHOWING 1–20 OF 20

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES