Merli is an Italian surname. Notable people with the surname include:
Adalberto Maria Merli (born 1938), Italian actor Corrado Merli (born 1959), Italian footballer Danio Merli (born 1956), Italian sprint canoeist Francesco Merli (1887–1976), Italian opera singer Franco Merli (1956–2025), Italian actor Gino J. Merli (1924–2002), United States Army Medal of Honor recipient Maurizio Merli (1940–1989), Italian actor Reidar Merli (1917–2007), Norwegian wrestler Simone Merli, Italian Electronic musician and Music producer
Other Merli is the name of a character, part of the Vocaloid software package. Merlí is a TV series produced by Catalan channel TV3.