Tiga or TIGA may refer to:
- Tiga (musician), Canadian DJ/producer
- Tiga, pseudonym of Haitian artist Jean-Claude Garoute
- Tiga Dam, a dam in Northeast Nigeria
- Tiga Island, a small Melanesian island in the Loyalty Islands of New Caledonia
- Texas Instruments Graphics Architecture
- The Independent Games Developers Association
- Tiga Race Cars, a racing car manufacturer
- Ultraman Tiga
- Three in Indonesian language
- Torts (Interference with Goods) Act 1977, a piece of British legislation dealing with the noncriminal aspects of unlawful interference with or taking of goods belonging to someone else