Isaia is a given name and surname. Notable people with the name include:
People with the given name Isaia Cordinier (born 1996), French basketball player Isaia Gonewai, Fijian politician Isaia Italeli (1960s–2011), Tuvaluan politician Isaia Răcăciuni (1900–1976), Romanian writer and editor Isaia Rasila (1969–2010), Fijian rugby union player Isaia Taape, Tuvaluan politician Isaia Toeava (born 1986), New Zealand rugby union player
People with the surname Enrico Isaia, founder of eponymous Neapolitan tailoring brand Lino Isaia, politician from Tokelau Sale Isaia (born 1972), former American football player
See also Isaia, Italian menswear brand Isaiah (given name) Isaias (given name)