Biggest Cities in Maine - 2015 Census Data

Rank	City	2016 Population (Est.)	Growth Rate (Annual)
1	Portland	66,881	0.2%
2	Lewiston	36,202	-0.2%
3	Bangor	32,391	-0.4%
4	South Portland	25,556	0.4%
5	Auburn	22,871	-0.2%
6	Biddeford	21,282	0.0%
7	Sanford	20,893	–
8	Saco	19,078	0.6%
9	Augusta	18,471	-0.7%
10	Westbrook	17,978	0.5%
11	Waterville	16,261	0.7%
12	Brewer	9,232	-0.5%
13	Presque Isle	9,171	-1.1%
14	Bath	8,305	-0.5%
15	Ellsworth	7,857	0.3%
16	Caribou	7,816	-0.9%
17	Old Town	7,624	-0.6%
18	Rockland	7,237	-0.2%
19	Belfast	6,682	0.0%
20	Gardiner	5,597	-0.7%
21	Calais	2,980	-0.9%
22	Hallowell	2,315	-0.6%
23	Eastport	1,266	-1.0%