A caldera is a volcanic feature formed by the collapse of land following a volcanic eruption.
Caldera may also refer to:
- People
- Louis Caldera (born 1956), former U.S. Secretary of the Army
- Rafael Caldera (1916–2009), 56th and 60th President of Venezuela
- Places
- Caldera, the port of the city of Puntarenas in Costa Rica
- Caldera, Chile, a port city
- Arts and entertainment
- Caldera (band)
- Caldera (film)
- Caldera, a town in the video game The Elder Scrolls III: Morrowind
- Caldera, a city in the video game Red Steel 2
- Caldera, a town/fortress in the video game Risen 2: Dark Waters
- Business
- Caldera (company), a US-based software company founded in 1994 to develop Linux- and DOS-based operating system products
- Caldera UK Ltd., a subsidiary of Caldera, Inc., and developers of DR-DOS between 1996 and 1999
- Caldera Deutschland GmbH, formerly LST GmbH, a Linux development center
- Caldera Thin Clients, Inc., later Lineo, a US-based subsidiary of Caldera, Inc. formed in 1998
- Caldera Systems, Inc., a US-based subsidiary of Caldera, Inc. formed in 1998 and releasing software including OpenLinux
- Caldera International, Inc., successor to Caldera Systems, Inc., later becoming the SCO Group
- Caldera K.K., a Japanese subsidiary of Caldera International, Inc. formed in 2001
- Caldera International, Inc., successor to Caldera Systems, Inc., later becoming the SCO Group
- Caldera OpenLinux, the operating system released by Caldera Systems often called "Caldera"
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- Caldera v. Microsoft, an antitrust lawsuit
- Caldera (France), an imaging software company founded in 1991 and unrelated to the US-based Caldera companies
- Sports
- Kona Caldera, a cross-country mountain bike frame
- Nike Caldera, a light-weight hiking boot