Fieschi is a family name for the following people:
- Adriano Fieschi (1788–1858), Italian cardinal of the Roman Church
- Bernard Fieschi (1952–2018), French classical guitarist
- Giorgio Fieschi († 1461), cardinal of the Catholic Church
- Giovanni Fieschi († 1384), cardinal of the Catholic Church
- Giovanni Luigi de Fieschi (1524 or 1525–1547), Genoese politician
- Joseph Fieschi (1790–1836), chief conspirator of the 1835 assassination attempt on the French King Louis Philippe
- Jacques Fieschi (* 1948), French screenwriter
- Niccolò Fieschi (1456–1524), Italian Roman Catholic cardinal and archbishop
- Ottobono Fieschi (around 1215–1276), Pope Hadrian V.
- Sinibaldo de Fieschi (around 1195–1254), Pope Innocent IV.