Glassboro is a borough in Gloucester County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 18,579, reflecting a decline of 489 (-2.6%) from the 19,068 counted in the 2000 Census, which had in turn increased by 3,454 (+22.1%) from the 15,614 counted in the 1990 Census.
What is now Glassboro was originally formed as a township by an act of the New Jersey Legislature on March 11, 1878, from portions of Clayton Township. Portions of the township were taken to form Elk Township (April 17, 1891) and Pitman (May 24, 1905). Glassboro was incorporated as a borough on March 18, 1920, replacing Glassboro Township.
Glassboro is home to Rowan University, founded in 1923 and formerly known as Glassboro State College, which was the site of the Glassboro Summit Conference in 1967 between U.S. President Lyndon B. Johnson and Soviet Premier Alexei Kosygin.