Horiuchi (Japanese: 堀内) is a Japanese surname. Notable people with the surname include:
Gen Horiuchi (堀内 元), Japanese ballet dancer and choreographer
Glenn Horiuchi (1955–2000), American jazz pianist, composer, and shamisen player
Hatsutarō Horiuchi (堀内 初太郎, 1909–1986), Japanese photographer
Iwao Horiuchi (堀内 岩雄, born 1941), Japanese sport wrestler
Kenyu Horiuchi (堀内 賢雄, born 1957), Japanese voice actor
Lon Horiuchi (born 1954), American FBI sniper
Masami Horiuchi (堀内 正美, born 1950), Japanese actor
Mika Horiuchi (born 1986), American musician
Mitsuo Horiuchi (堀内 光雄, born 1930), Japanese politician
Paul Horiuchi (1906–1999), Japanese-American painter and collagist
Takao Horiuchi (堀内 孝雄, born 1949), Japanese pop and enka singer
Toyoaki Horiuchi (堀内 豊秋, 1900–1948), Imperial Japanese Navy officer
Tsuneo Horiuchi (堀内 恒夫, born 1948), Japanese baseball player
Yoko Horiuchi (堀内 葉子, born 1982), Japanese model
Yu Horiuchi (born 1990), a Japanese female wrestler
