Biggest Cities in Maine - 2018 Census Data

Rank	City	2019 Population (Est.)	Growth Rate (Annual)
1	Portland	66,417	0.0%
2	Lewiston	35,944	-0.2%
3	Bangor	31,997	-0.4%
4	South Portland	25,606	0.3%
5	Auburn	23,196	0.1%
6	Biddeford	21,514	0.1%
7	Sanford	21,183	–
8	Saco	19,748	0.8%
9	Westbrook	18,974	1.0%
10	Augusta	18,681	-0.3%
11	Waterville	16,646	0.7%
12	Brewer	9,051	-0.6%
13	Presque Isle	8,998	-0.9%
14	Bath	8,329	-0.3%
15	Ellsworth	8,048	0.5%
16	Caribou	7,614	-0.9%
17	Old Town	7,459	-0.6%
18	Rockland	7,146	-0.3%
19	Belfast	6,714	0.1%
20	Gardiner	5,660	-0.3%
21	Calais	2,989	-0.5%
22	Hallowell	2,371	-0.1%
23	Eastport	1,259	-0.7%