Hiroya Saito (斉藤浩哉, Saitō Hiroya) (born 1 September 1970) is a Japanese former ski jumper.

He competed from 1991 to 2002.

He won a gold medal at the 1998 Winter Olympics in Nagano in the Team large hill event.

Saito is a three-time FIS Nordic World Ski Championships medalist with two silvers (1995: Individual normal hill and 1997: Team large hill) and one bronze (1995: Team large hill).