Fastest-growing city in Maine: Lewiston

Number of households: 15,841
Change YOY: 2.63 percent
Change since 2000: 3.6 percent
Average household income: $44,621

Why: The population of Lewiston, home to Bates College, grew for the first time in three decades from 2000 to 2010, due to an influx of Somali immigrants, reported the Sun Journal. The Wal-Mart Distribution Center and the health-care industry added jobs and the city worked to keep existing businesses from leaving. The area had an unemployment rate of 8.2 percent in February, according to the Maine Labor Dept.