Nitto or Nittō or ''variant'' may refer to: * Nitto Boseki, Tokyo-based manufacturer of textile and fiberglass products * Nitto Denko, corporation producing insulators, tapes, films, LCDs; sponsor of the year-end ATP Finals tennis championship. * Nitto Tire, tire company bought by Toyo * Nitto Records, Japanese record company * ''Nittō Aviation'', predecessor to Japan Domestic Airlines * ''Nitto'', Japanese model manufacturer, see List of model car brands * ''nittō guhō junreikōki'', Japanese name of the '' Ennin's Diary'' * "Nitto Co. Ltd.", a Japanese manufacturer of bicycle parts ;People * Frank Nitti, aka ''Francesco Raffaele Nitto'' (1886–1943), a mafia enforcer

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