Jacopo Dolfin or Giacomo Dolfin was a 13th-century Venetian nobleman and senior provincial administrator in the Venetian overseas empire.
[1] In 1256–1258 he served as the penultimate Venetian Podestà of Constantinople, succeeding Pietro Foscarini in spring 1256 and being replaced by Marco Gradenigo.
[2] He went on to serve as Duke of Crete (attested in office in September 1259) until September 1261,[1] and as commander of a fleet of 37 galleys in the Aegean Sea against the Republic of Genoa in 1262.
[3] In 1264 he was Bailo of Negroponte, before going to Constantinople as ambassador to Emperor Michael VIII Palaiologos.
[1] Along with Jacopo Contarini, Dolfin concluded a peace treaty with the Emperor on 18 June 1265, that would remain unratified by Venice.