Mariotto is a given name and surname. Notable people with the name include:
Given name Mariotto Albertinelli (1474–1515), Italian Renaissance painter Mariotto di Nardo (fl. 1388–1424), Florentine painter in the Florentine Gothic style Mariotto Segni (born 1939), Italian politician and professor of civil law
Surname Angela Mariotto, statistician Bernardino di Mariotto (1478–1566), Italian painter Danilo Mariotto (born 1996), Brazilian footballer Sara Mariotto (born 1997), Italian professional racing cyclist