Petrini is an Italian surname. Notable people with the surname include:
Bartolommeo Petrini (1642–1664), Italian painter of the late-Baroque period Carlo Petrini (1949–2026), Italian activist and founder of the international Slow Food movement Carlo Petrini (footballer) (1948–2012), Italian football player and coach Carlo Petrini (scientist) (born 1965), Italian scientist and senior researcher at the Italian National Institute of Health Elena Maria Petrini (born 1992), Italian triathlete and 2010 aquathlon world champion Francesco Petrini (1744–1819), harpist and composer Giuseppe Petrini, Italian composer Giuseppe Antonio Petrini (1677– c. 1755), Swiss painter of the late-Baroque, active mainly in Lugano Gulli Petrini (1867–1941), Swedish Physicist, writer, suffragette, women's rights activist and politician Henrik Petrini (1863–1957), Swedish mathematician Hilda Petrini (1838–1895), Swedish clock maker of Italian descent Raffaella Petrini (born 1969), Italian religious sister