As of my last update (September 2021), Andrés Manuel López Obrador (AMLO) is serving as Mexico's 34th President. His six-year term (sexenio) began December 1, 2018 and is constitutionally limited to a single term ending in 2024.
Key context:
Note: My information may be outdated. For current status, consult the Presidencia de la República official site or trusted Mexican/international news (Reuters, AP, El Universal, Reforma).