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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.
The Shirley Census Designated Place had a population of 26,121 as of July 1, 2017. Shirley ranks in the upper quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in New York. See peer rankings below. The primary coordinate point for Shirley is located at latitude 40.7967 and longitude -72.874 in Suffolk County.