The Glassmen Drum and Bugle Corps is a Drum Corps International World Class (formerly Division I) drum and bugle corps based out of Toledo, Ohio that was founded in 1961. A member of Drum Corps International, it is one of three World Class corps in Ohio, along with the Bluecoats and Capital Regiment. The name "Glassmen" comes from Toledo's prominent glass industry, which has earned the city the nickname of "the Glass City." They have placed fifth three times at DCI World Championship Finals (1998, 1999, and 2001) and have made the prestigious Top 12 fifteen times, most recently in 2009. In 2006, the corps made its first European tour, visiting France, Belgium, the Netherlands, and England.

The current director is Brian Hickman, and the corps song is "Madre de la Tierra." Previously, the director was Dan Acheson, who left the corps to become the Executive Director of Drum Corps International in 1995.