Toranzo is a surname. Notable people with the surname include:
Borja Toranzo (1759–1847), Argentine philanthropist and patriot Fernando Toranzo Fernández (born 1950), Mexican politician Gustavo Toranzo (born 1987), Argentine footballer Nicasio Sánchez Toranzo (1905–2009), Argentine diplomat and politician Patricio Toranzo (born 1982), Argentine footballer