Celso Roberto Pitta do Nascimento (Portuguese: [ˈsɛwsu ˈpitɐ]; 29 September 1946 – 21 November 2009) was a Brazilian economist and politician.

Pitta was a member of the PPB party at that time, and faced corruption allegations like his predecessor, most notoriously with accusations coming from his ex-wife, Nicéa Camargo.

On May 26, 2000, he was ousted from office by a decision of the São Paulo State Supreme Court, and Vice Mayor Régis de Oliveira succeeded to the mayoralty.

Eighteen days later the court's decision was reversed, and Pitta returned to office with Régis de Oliveira as vice mayor.

Celso Pitta was indicted for money laundering and fraud, having already been convicted on two charges related to the precatórios, before his arrest during the Satiagraha Operation.