Census Bureau, the township had a total area of 46.93 square miles (121.54 km 2), including 46.42 square miles (120.23 km 2) of land and 0.51 square miles (1.31 km 2) of water (1.08%). The township was named for President James Monroe. In 1950, portions of the township were transferred to Winslow Township in Camden County. Monroe Township was shifted to Gloucester County on February 28, 1871, along with the majority of Washington Township.

Monroe Township was originally formed as a township by an act of the New Jersey Legislature on March 3, 1859, from portions of Washington Township while the area was still part of Camden County.

The township is part of the South Jersey region of the state and a suburb of Philadelphia, within the Delaware Valley.

As of the 2020 United States census, the township's population was 37,117, its highest decennial count ever and an increase of 988 (+2.7%) from the 36,129 recorded at the 2010 census, which in turn had reflected an increase of 7,162 (+24.7%) from the 28,967 counted at the 2000 census. Monroe Township is a township in Gloucester County, in the U.S.

Monroe township