Rank	City	2017 Population (Est.)	Growth Rate (Annual)
1	Portland	66,937	0.2%
2	Lewiston	36,140	-0.2%
3	Bangor	31,985	-0.5%
4	South Portland	25,577	0.4%
5	Auburn	22,948	-0.1%
6	Biddeford	21,362	0.1%
7	Sanford	20,938	–
8	Saco	19,213	0.6%
9	Augusta	18,494	-0.6%
10	Westbrook	18,402	0.8%
11	Waterville	16,406	0.7%
12	Brewer	9,107	-0.7%
13	Presque Isle	9,106	-1.0%
14	Bath	8,303	-0.4%
15	Ellsworth	7,911	0.4%
16	Caribou	7,736	-0.9%
17	Old Town	7,518	-0.7%
18	Rockland	7,179	-0.3%
19	Belfast	6,647	-0.1%
20	Gardiner	5,620	-0.5%
21	Calais	2,965	-0.9%
22	Hallowell	2,326	-0.4%
23	Eastport	1,255	-1.0%