Petrus Augustus de Génestet (P.A. de Génestet) (Amsterdam, November 21, 1829 – Rozendaal, July 2, 1861) was a Dutch poet and a theologian.
Petrus Augustus de Génestet lost both of his parents at a very young age; after that he lived with his uncle, the Dutch painter Jan Adam Kruseman. He studied at the Amsterdamse Atheneum and the Seminarium der Remonstrantse Broederschap to become a preacher. He became minister in March 1852 at the Genestetkerk (Genestetchurch) that was named after him, in Delft. In the same year he got married to Henriette Bienfait in Bloemendaal. They had two children. In 1859, he lost both his wife and oldest child died of tubercolosis, and because of his poor health he had to quit working as a minister. He moved to Amsterdam, but spent most of his summers in Bloemendaal. Two years later, in 1861, he died in Rozendaal due to tubercolosis.