The Starleague (Hangul: 스타리그) is registered trademark of OnGameNet channel, a subsidiary of On-Media conglomerate. The OnGameNet Starleague is a professional StarCraft individual league run by OnGameNet in South Korea. A title in the Starleague is considered to be the most prestigious title in the StarCraft community. It is also known as the OnGameNet Starleague, or OSL for short.

The term is often but erroneously used to refer to the MSL, the MBCGame StarCraft League.

A compilation of all OSL and MSL participants who placed in the top four, including victories, can be found here.