Biggest Cities in Maine - 2020 Census Data

Rank	City	2020 Population	Growth Rate (Annual)
1	Portland	68,427	0.3%
2	Lewiston	36,746	0.0%
3	Bangor	31,765	-0.4%
4	South Portland	26,548	0.6%
5	Auburn	23,944	0.4%
6	Biddeford	22,491	0.6%
7	Sanford	21,956	–
8	Saco	20,405	1.0%
9	Westbrook	20,404	1.6%
10	Augusta	18,923	-0.1%
11	Waterville	15,946	0.1%
12	Brewer	9,638	0.2%
13	Presque Isle	8,808	-1.0%
14	Bath	8,742	0.3%
15	Ellsworth	8,388	0.8%
16	Caribou	7,382	-1.0%
17	Old Town	7,372	-0.6%
18	Rockland	6,942	-0.5%
19	Belfast	6,900	0.3%
20	Gardiner	5,965	0.3%
21	Calais	3,023	-0.3%
22	Hallowell	2,567	0.8%
23	Eastport	1,278	-0.4%