Sebastián Ernesto Vega (born July 9, 1988) is an Argentine professional basketball player for Gimnasia y Esgrima de Comodoro Rivadavia, in the Liga Nacional de Básquet. At 6 feet 7 inches (2.01 m), he plays as a small forward. He made his debut for Central Entrerriano in 2004, and later spent five years in Quimsa. Vega has played for Gimnasia y Esgrima since 2018. Vega has also played for the national basketball team, representing Argentina in the 2010 South American Basketball Championship.