Troia is a surname. Notable people with the surname include:
Kathleen Troia McFarland (born 1951), American communications consultant Mariano Tullio Troia (1933–2010), member of the Sicilian Mafia Oliviero Troia (born 1994), Italian cyclist Vinny Troia, American cybersecurity researcher
See also Troia (disambiguation) Troja (surname)