Noguchi (野口 lit. "field entrance") is a Japanese surname. Notable people with the surname include:
Fujio Noguchi (野口富士男), novelistGoro Noguchi (野口五郎), singer and actorHaruchika Noguchi (野口晴哉), the founder of SeitaiHideyo Noguchi (野口英世), bacteriologist, discoverer of the agent of syphilisHiroshi Noguchi (野口裕司), football playerIsamu Noguchi (野口勇), Japanese-American sculptorJiro Noguchi (野口二郎), baseball playerKen Noguchi (野口健), alpinistKenji Noguchi (野口健司), member of the ShinsengumiKoji Noguchi (野口幸司), football playerOsamu Noguchi (野口修), founder of Japanese kickboxingShigeki Noguchi (野口茂樹), baseball playerShitagau Noguchi (野口遵), businesspeopleSoichi Noguchi (野口晴哉), astronautThomas Noguchi (トーマス野口), Japanese-American coroner for Los Angeles CountyToshihiro Noguchi (野口寿浩), baseball playerMasaaki Noguchi (野口正明), baseball playerMika Noguchi (野口美佳), businesswomanMizuki Noguchi (野口みずき), athleteNeisai Noguchi (野口寧斎), poetNawoko Noguchi, also known as Naoko Ken (研ナオコ), singer, actress and television personalityRyu Noguchi (野口竜), manga artist and designerUjo Noguchi (野口雨情), authorYasutada Noguchi (野口安忠), athleteYataro Noguchi (野口弥太郎), painterYone Noguchi (野口米次郎), poet and father of Isamu NoguchiYoshiyuki Noguchi (野口祥順), baseball playerYukio Noguchi (野口悠紀雄), economist