The Retail Clerks International Union (RCIU) was a labor union that represented retail employees. The RCIU was chartered as the "Retail Clerks National Protective Union" in 1890 by the American Federation of Labor. It later adopted the name Retail Clerks International Association, and subsequently became the Retail Clerks International Union. In 1979, the Retail Clerks merged with the Amalgamated Meat Cutters to form the United Food and Commercial Workers.
In late 1957 and most of 1958, there was a 13-month-long strike against three department stores in Toledo, Ohio, Lasalle & Koch, Lamson's, and Lion Store, by the Retail Clerks International Association. The strike was settled by a "Statement of Understanding" under which the striking workers were reinstated to their jobs but the union was not recognized.