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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.
Penobscot County is a county located in the U.S. state of Maine. As of the 2010 census, the population was 153,923. Its county seat is Bangor. The county was established on 15 February 1816 from a portion of Hancock County when the area was still part of Massachusetts.