Sebastián Ernesto Vega (born July 9, 1988) is an Argentine professional basketball player for Boca Juniors, in the Liga Nacional de Básquet.

Vega's debut was in 2004, for the local Central Entrerriano club in Gualeguaychú, Entre Ríos.

He would later play for Peñarol de Mar del Plata from 2008 to 2010, and for Boca Juniors from 2010 to 2011.

[7] In 2020, Vega came out as gay through a post on his Twitter account, becoming the first professional basketball player in Argentina to do so.

[8][9] In 2022, during a game against Quimsa in Santiago del Estero, Vega was subject to homophobic slurs coming from the audience.