Biggest Cities in Maine - 2019 Census Data

Rank	City	2020 Population (Est.)	Growth Rate (Annual)
1	Portland	66,215	0.0%
2	Lewiston	36,225	-0.1%
3	Bangor	32,262	-0.3%
4	South Portland	25,532	0.2%
5	Auburn	23,414	0.2%
6	Biddeford	21,504	0.1%
7	Sanford	21,223	–
8	Saco	19,964	0.9%
9	Westbrook	19,074	1.0%
10	Augusta	18,697	-0.3%
11	Waterville	16,558	0.6%
12	Brewer	9,035	-0.5%
13	Presque Isle	9,007	-0.8%
14	Bath	8,338	-0.2%
15	Ellsworth	8,180	0.6%
16	Caribou	7,593	-0.8%
17	Old Town	7,431	-0.6%
18	Rockland	7,165	-0.2%
19	Belfast	6,679	0.0%
20	Gardiner	5,653	-0.3%
21	Calais	3,005	-0.4%
22	Hallowell	2,381	–
23	Eastport	1,265	-0.6%