A foundry is a factory that produces metal castings.

Foundry or The Foundry may also refer to:

• Type foundry, a type of company that produces and/or distributes typefaces
• Semiconductor fabrication plant, a factory where semiconductor devices are manufactured using the Foundry model

• The Foundery (or Foundry), an 18th-century Methodist chapel London established by John Wesley
• The Foundry (United States region), the industrial core of North America as identified by Joel Garreau
• The Foundry, a U.S. organization identified as a white nationalist hate group by the Southern Poverty Law Center
• The Foundry Visionmongers, a London-based VFX software company
• The Foundry, East Quay, Peel, Isle of Man, one of Isle of Man's Registered Buildings
• Foundry (bar), a bar in Shoreditch
• Foundry Networks, a U.S. Ethernet switch and router manufacturer
• "The Foundry" (Supernatural), an episode of the television series Supernatural
• Foundry (band), an American hard rock band from Las Vegas
• Wargames Foundry, a games company created by Bryan Ansell
• Foundry, a network of mental health resource centres in British Columbia
• Foundry, a fictional planet in the Star Wars franchise
• Foundry, a wholly-owned subsidiary of International Data Group
• Foundry, a cryptocurrency mining services company owned by Digital Currency Group