The International Longshoremen's Association, AFL-CIO is the largest union of maritime workers in North America, representing upwards of 65,000 longshoremen on the Atlantic and Gulf Coasts, Great Lakes, major U.S. rivers, Puerto Rico and Eastern Canada.

Organized in 1892 along the U.S. Great Lakes, the ILA is affiliated with the American Federation of Labor and Congress of Industrial Organizations; the Canadian Labour Congress and the world-wide International Transport Workers' Federation.

Additionally, the International Organization of Masters, Mates and Pilots; the United Marine Division Tugboat Workers and the New York State Supreme Court Officers are affiliated with the ILA.