The Industrial Union of Marine and Shipbuilding Workers of America (IUMSWA) was an American labor union which existed between 1933 and 1988. The IUMSWA was first organised at the New York Shipbuilding Corporation shipyard in Camden, New Jersey after striking in 1934 and 1935. From here it slowly spread to a number of other private shipyards in the Northeast, gaining representation at the Staten Island shipyard in 1936, the Federal Shipyard in 1937, Brooklyn and Hoboken in 1939, Baltimore and Sparrows Point in 1941, as well as a range of other smaller ship repair yards in the New York area. The IUMSWA's industrial coverage of all production workers in the shipbuilding industry brought it into conflict with established craft unions, such as the boilermakers, leading the IUMSWA to be refused an AFL charter in 1933. The IUMSWA later joined the Congress of Industrial Organizations in 1936.