Furuya (written: 古谷 or 古屋) is a Japanese surname. Notable people with the surname include:
Keiji Furuya (古屋 圭司) (born 1952), Japanese politician
Masajiro Furuya (古屋 政次郎) (1862–1938), Japanese American banker, merchant and businessman
Megumi Furuya (古谷 仁) (born 1981), Japanese actress, singer and gravure idol
Minoru Furuya (古谷 実) (born 1972), Japanese manga artist
Mitsutoshi Furuya (古谷 三敏) (born 1936), Japanese manga artist
Noriko Furuya (古屋 範子) (born 1956), Japanese politician
Seiichi Furuya (古屋 誠一) (born 1950), Japanese photographer
Takuya Furuya (古谷 拓哉) (born 1981), Japanese baseball player
Tōru Furuya (古谷 徹) (born 1953), Japanese narrator and voice actor
Usamaru Furuya (古屋 兎丸) (born 1968), Japanese manga artist