Vulcan is the name of several different things, derived from the name of the Roman god of fire and volcanoes, who made weapons for the other gods.

• Vulcan (god), a god in Roman mythology
• Avro Vulcan, aircraft
• M61 Vulcan, gun
• Vulcan (planet), a hypothetical planet between Mercury and the Sun
• Vulcan processor , a type of processors
• Vulcan (Star Trek), the fictional planet and the race in Star Trek
• The Town of Vulcan, Alberta
• The City of Vulcan, Romania
• Vulcan Media , an educational software company from Poland
• Vulcan (volcano), a volcano in New Guinea
• Vulcan of the alchemists, primary 'deity' associated with Paracelsian alchemy
• Vulcan OS , an operating system for some Harris Corporation minicomputers
• Vulcan Ventures, an investment company founded by Paul Allen