Costas is a Greek name. As a given name it is the hypocorism for Constantine (e.g. Costas Karamanlis).
Costas may refer to:
- Bob Costas, an American sportscaster and host of the talk show, Costas Now
- Jon Costas, an American politician
- Costas Andreou, a Greek musician
- Costas Azariadis, a Greek economist
- Costas Georgiou, a Greek Cypriot mercenary
- Costas Hajihristos, a Greek actor
- Costas Mandylor, an Australian actor
- Costas Rigas, a Greek basketball player
- Costas Simitis, former Prime Minister of Greece
- John P. Costas, an American Engineer
- John P. Costas, an American businessman, banker and trader