James Garrett Thimmes (October 4, 1896 – January 16, 1955) was an American labor unionist.
After the war, he moved to Chicago, where he joined the Amalgamated Association of Iron, Steel and Tin Workers.
[1][2] In 1924, Thimmes became president of his union lodge, and in 1936 he wrote the successful resolution proposing that the union's leadership to work with the Congress of Industrial Organizations (CIO) to establish the Steel Workers' Organizing Committee (SWOC).
Thimmes began working full-time for the SWOC, initially in Chicago, and then in California.
In 1940, he was appointed as director of the new United Steel Workers of America's (USWA) District 38, covering California, and also as president of the California Industrial Union Council.