Carlos Diego de Mesa Gisbert is a Bolivian historian, journalist, and politician who served as the 63rd president of Bolivia from 2003 to 2005. As an independent politician, he previously served as the 37th vice president of Bolivia from 2002 to 2003 under Gonzalo Sánchez de Lozada and was the international spokesman for Bolivia's lawsuit against Chile in the International Court of Justice from 2014 to 2018. A member of the Revolutionary Left Front, he has served as leader of Civic Community, the largest opposition parliamentary group in Bolivia, since 2018.

The president of Bolivia, officially known as the president of the Plurinational State of Bolivia, is head of state and head of government of Bolivia and the captain general of the Armed Forces of Bolivia.