Alpha is a borough in Warren County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 2,369, reflecting a decline of 113 (-4.6%) from the 2,482 counted in the 2000 Census, which had in turn declined by 48 (-1.9%) from the 2,530 counted in the 1990 Census.Alpha was incorporated as a borough from portions of Pohatcong Township by an act of the New Jersey Legislature passed on June 26, 1911, and signed by Governor Woodrow Wilson, based on the results of a referendum held on May 31, 1911. The borough was named for the Alpha Cement Works.The borough is one of the eastern-most locations within the Lehigh Valley region of Pennsylvania and New Jersey.GeographyAccording to the United States Census Bureau, the borough had a total area of 1.698 square miles (4.397 km2), including 1.672 square miles (4.329 km2) of land and 0.026 square miles (0.068 km2) of water (1.54%).Unincorporated communities, localities and place names located partially or completely within the borough include Vulcanite.The borough is completely surrounded by Pohatcong Township, making it part of 21 pairs of "doughnut towns" in the state, where one municipality entirely surrounds another.
