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Shirley is a town in Piscataquis County, Maine, United States. The town was named after Shirley, Massachusetts. The population was 233 at the 2010 census.
Located in Middlesex County, Lowell (along with Cambridge) was a county seat until Massachusetts disbanded county government in 1999. With an estimated population of 109,945 in 2014, it is the fourth-largest city in Massachusetts, and the second-largest in the Boston metropolitan statistical area.