Coia is an Italian, English & Scottish surname. Notable people with the surname include:
Angelo Coia (1938–2013), American football player Arthur Coia (1943–2025), American labor union leader Dame Denise Coia (1952–2020), Scottish psychiatrist and mental health advocate Emilio Coia (1911–1997), Scottish caricaturist Maximin Coia (born 1983), French pair skater Paul Coia (born 1955), Scottish television presenter and continuity announcer
See also Gillespie, Kidd & Coia, Scottish architectural firm famous for their application of modernism in churches and universities