Biggest Cities in Maine - 2017 Census Data

Rank	City	2018 Population (Est.)	Growth Rate (Annual)
1	Portland	66,882	0.1%
2	Lewiston	36,221	-0.1%
3	Bangor	31,903	-0.5%
4	South Portland	25,483	0.3%
5	Auburn	23,033	-0.0%
6	Biddeford	21,488	0.1%
7	Sanford	21,028	–
8	Saco	19,485	0.8%
9	Westbrook	18,730	1.0%
10	Augusta	18,594	-0.4%
11	Waterville	16,600	0.8%
12	Presque Isle	9,078	-0.9%
13	Brewer	9,043	-0.7%
14	Bath	8,317	-0.3%
15	Ellsworth	7,973	0.4%
16	Caribou	7,684	-0.9%
17	Old Town	7,497	-0.6%
18	Rockland	7,186	-0.2%
19	Belfast	6,752	0.2%
20	Gardiner	5,688	-0.3%
21	Calais	2,988	-0.6%
22	Hallowell	2,365	-0.1%
23	Eastport	1,267	-0.7%