Carlos Diego Mesa Gisbert (born August 12, 1953) served as president of Bolivia from 2003 to 2005.
He was vice president of Bolivia from August 2002 to October 2003.
Mesa previously had been a television journalist.
His widespread recognition prompted the MNR candidate Gonzalo Sánchez de Lozada to pick him as running mate in the 2002 Bolivian presidential elections.
The winning ticket of Sánchez-Mesa took office August 6, 2002.
Soon after becoming vice president, a wave of protests and strikes shut down Bolivia in a bitter dispute known as the Bolivian Gas War.
The demonstrations eventually forced Sánchez de Lozada to resign, which put forward Mesa as president.
Mesa was a spokesman for Bolivia in the Obligation to Negotiate Access to the Pacific Ocean case in the International Court of Justice, which was ultimately unsuccessful.