Luis Proto Barbosa (11 January 1927 – 6 October 2011), also known as Poto Barboz, was an Indian politician and medical practitioner who served as the Chief Minister of Goa for eight months from April to December 1990.

Barbosa was a member of the Indian National Congress.

He played a significant role in the historic Opinion Poll of 1967.

He was one of the members elected to the first legislative assembly constituted after Goa's Liberation from Portuguese rule.

[1] Barbosa headed a coalition government of 6 Congress defectors by joining in a coalition with the much larger 18 member Maharshtrawadi Gomantak Party.