RANKING · 2025 ACS · 20 SHOWN OF 20

Most densely populated, Maine cities

Maine cities ranked by residents per square mile (2023). This list covers the 20 cities in Maine that qualify, ranked against each other statewide.

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MaineAll 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

01Portland, MEME69,9113,246+9%

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

03Waterville, MEME17,5791,299+13%

04Westbrook, MEME21,5651,255+34%

05Lewiston, MEME38,8661,138+9%

06Bath, MEME8,835969−5%

07Bangor, MEME32,518949+3%

08Biddeford, MEME22,399745+7%

09Brewer, MEME9,636632+7%

10Rockland, MEME7,142556−6%

11Saco, MEME21,159548+26%

12Sanford, MEME22,663474+124%

13Auburn, MEME25,441429+10%

14Gardiner, MEME6,206396+0%

15Augusta, MEME19,155347+3%

16Belfast, MEME6,988205+10%

17Old, MEME7,589196−7%

18Presque Isle, MEME8,694115−9%

19Ellsworth, MEME8,862112+37%

20Caribou, MEME7,32192−12%

SHOWING 1–20 OF 20

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