Inostroza is a surname. Notable people with the surname include:
Benjamín Inostroza (born 1997), Chilean footballer Diego Inostroza (born 1992), Chilean footballer Eddio Inostroza (born 1946), Chilean footballer Enrique Inostroza (1921–2006), Chilean marathon runner Jesús Inostroza (born 1956), Chilean photographer Juan Inostroza (1942–1989), Chilean fencer Paris Inostroza (born 1972), Chilean fencer Raúl Inostroza (1921–1975), Chilean long-distance runner