Boilermakers Union

Boilermakers Union can refer to:
 * Amalgamated Society of Boilermakers, Shipwrights, Blacksmiths and Structural Workers, a defunct trade union in the United Kingdom
 * Boilermakers' Society of Australia, a defunct trade union in Australia
 * Boilermakers and Blacksmiths Society of Australia, a defunct trade union in Australia
 * GMB (trade union), a trade union in the United Kingdom
 * International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers, a trade union in the United States of America