The mayor of Belgrade (Serbian: Градоначелник Београда, romanized: Gradonačelnik Beograda) is the head of the City of Belgrade (the capital and largest city of Serbia). The mayor acts on behalf of the city, and performs an executive function in the City of Belgrade. The position is important as the city is the most important hub of economy, culture, science and technology in Serbia.

The current mayor of Belgrade is Aleksandar Šapić of the Serbian Progressive Party, elected after the 2024 City Assembly election.

According to the current legislation, the mayor is elected along with members of the City Assembly at the direct secret ballot for the period of four years. The mayor may not be a councilor of the City Assembly.

The mayor has a deputy who replaces him or her in case of an extended absence and/or due to any other reasons that prevent the mayor to perform the duties. The mayor appoints and dismisses the deputy mayor based on the approval of the City Assembly.

The mayor is concurrently the chairman of the city council with the right to vote.