Rank	City	2015 Population (Est.)	Growth Rate (Annual)
1	Portland	66,666	0.2%
2	Lewiston	36,299	-0.2%
3	Bangor	32,568	-0.4%
4	South Portland	25,424	0.4%
5	Auburn	22,912	-0.2%
6	Biddeford	21,337	0.1%
7	Sanford	20,906	–
8	Saco	19,014	0.7%
9	Augusta	18,705	-0.6%
10	Westbrook	17,886	0.6%
11	Waterville	16,182	0.7%
12	Brewer	9,317	-0.4%
13	Presque Isle	9,317	-1.0%
14	Bath	8,324	-0.6%
15	Caribou	7,871	-1.0%
16	Ellsworth	7,843	0.3%
17	Old Town	7,693	-0.5%
18	Rockland	7,219	-0.3%
19	Belfast	6,677	0.0%
20	Gardiner	5,675	-0.5%
21	Calais	3,004	-1.0%
22	Hallowell	2,329	-0.6%
23	Eastport	1,272	-1.1%