Red Hat (disambiguation)

Red Hat is an American software company that provides open source software products.

• Red Hat, a site in Project 112, an American biological and chemical weapon experimentation project
• Red Hat sect, three different schools of Tibetan Buddhism
• Red Hat Society,
• Red hat, one of de Bono's Six Thinking Hats
• Red hat, a trainee in a volunteer fire department
• Red Hat Cell Block, a former prison cell block at the Louisiana State Penitentiary
• Operation Red Hat, a 1971 United States movement of chemical warfare munitions