A combination is a mathematical collection of things in a context where their specific order is irrelevant.
Combination, combinations, or combo may also refer to:
- Combination (chess), a relatively long sequence of chess moves, involving temporary loss of materials
- Combination (jump), in horseback riding
- Combination bus, a purpose-built truck with a "passenger container"
- Combination company, in the late 19th century, a touring theater company that performed only one play
- Combination Game, a style of association football based around teamwork and cooperation
- Combination meal, typically includes food items and a beverage
- Combination tone, a psychoacoustic phenomenon
- Combinations (finance), the simultaneous buying or selling of one or more options that differ in one or more of the options' variables
- Combinations (album), 2007 album by Eisley
- Striking combination, several strikes in a row in combat sports
- The Combination (film), 2009 Australian drama, directed by David Field
- The Combination, an early English football league, 1888–89 and 1890–1911