Horiuchi (Japanese: 堀内) is a Japanese surname. Notable people with the surname include:
Gen Horiuchi (堀内 元), Japanese ballet dancer and choreographerGlenn Horiuchi (1955–2000), American jazz pianist, composer, and shamisen playerHatsutarō Horiuchi (堀内 初太郎, 1909–1986), Japanese photographerIwao Horiuchi (堀内 岩雄, born 1941), Japanese sport wrestlerKenyu Horiuchi (堀内 賢雄, born 1957), Japanese voice actorLon Horiuchi (born 1954), American FBI sniperMasami Horiuchi (堀内 正美, born 1950), Japanese actorMika Horiuchi (born 1986), American musicianMitsuo Horiuchi (堀内 光雄, born 1930), Japanese politicianPaul Horiuchi (1906–1999), Japanese-American painter and collagistTakao Horiuchi (堀内 孝雄, born 1949), Japanese pop and enka singerToyoaki Horiuchi (堀内 豊秋, 1900–1948), Imperial Japanese Navy officerTsuneo Horiuchi (堀内 恒夫, born 1948), Japanese baseball playerYoko Horiuchi (堀内 葉子, born 1982), Japanese modelYu Horiuchi (born 1990), a Japanese female wrestler