Olmo is a surname. Notable people with the surname include:
Angelica Olmo (born 1996), Italian triathlete Antonio Olmo (born 1954), Spanish footballer Antonio Olmo (cyclist) (born 1982), Spanish cyclist, brother of Juan Bartolomé Madrid Olmo (born 1964), Spanish politician Dani Olmo (born 1998), Spanish footballer Giuseppe Olmo (1911–1992), Italian road bicycle racer Harold Olmo (1909–2006), American viticulturist Jesús Olmo (born 1985), Spanish footballer Juan Olmo (born 1978), Spanish cyclist, brother of Antonio (cyclist) Luis Olmo (1919–2017), Puerto Rican baseball player Michael Olmo (born 1999), American rapper and singer known professionally as Iann Dior Miquel Olmo (born 1966), Spanish footballer and manager Víctor Olmo (born 2001), Spanish footballer Walter Olmo (1938–2019), Italian musician and composer