Jacopo Dolfin or Giacomo Dolfin was a 13th-century Venetian nobleman and senior provincial administrator in the Venetian overseas empire.
Jacopo Dolfin is recorded as a judge in Venice in 1241, as being present in Tunis in June 1245, and again as a judge in Venice in 1254. [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. [4] [5] In 1268 he served as podestà of Treviso. [1]