Sebastiano DiGaetano (Italian pronunciation: [sebaˈstjaːno diɡaeˈtaːno]; c. 1862 – disappeared March 1912) was an Italian-born American New York City mafia boss of what would later become known as the Bonanno crime family.

[1] DiGaetano's daughter, Angelina, married Joseph Ruffino, who was arrested for burglary in 1913 along with future mafia boss Joe Masseria.

[a][5] DiGaetano first came to the attention of authorities in December 1910, when he was arrested under suspicion of orchestrating the kidnappings of eight-year-old Giuseppe Longo and seven-year-old Michael Rizzo for ransom.

[5] A few months later, Salvatore Clemente, a Secret Service informer who was a counterfeiter in the Morello gang was summoned to a meeting with DiGaetano.

DiGaetano told Clemente to refrain from his counterfeiting activities until another mafioso, named Carmelo Codaro, who was suspected of disloyalty was "disposed of.