International Brotherhood of Teamsters
The International Brotherhood of Teamsters, with 1.4 million members, is one of the largest labor unions in the world. It is also the most diverse union in the U.S. Today, it would be hard to identify a Teamster on the streets because we are everywhere. The Union represents everyone from A to Z - from airplane pilots to zookeepers. One out of every ten union members is a Teamster. The Teamsters are part of Change to Win, a new labor federation of unions representing nearly six million workers.