Noguchi (野口 lit. "field entrance") is a Japanese surname.
People named Noguchi include:
- Fujio Noguchi (野口富士男), novelist
- Goro Noguchi (野口五郎), singer and actor
- Haruchika Noguchi (野口晴哉), the founder of Seitai
- Hideyo Noguchi (野口英世), bacteriologist, discoverer of the agent of syphilis
- Hiroshi Noguchi (野口裕司), football player
- Isamu Noguchi (野口勇), Japanese-American sculptor
- Jiro Noguchi (野口二郎), baseball player
- Ken Noguchi (野口健), alpinist
- Kenji Noguchi (野口健司), member of the Shinsengumi
- Koji Noguchi (野口幸司), football player
- Osamu Noguchi (野口修), founder of Japanese kickboxing
- Shigeki Noguchi (野口茂樹), baseball player
- Shitagau Noguchi (野口遵), businesspeople
- Soichi Noguchi (野口晴哉), astronaut
- Thomas Noguchi (トーマス野口), Japanese-American coroner for Los Angeles County
- Toshihiro Noguchi (野口寿浩), baseball player
- Masaaki Noguchi (野口正明), baseball player
- Mika Noguchi (野口美佳), businesswoman
- Mizuki Noguchi (野口みずき), athlete
- Neisai Noguchi (野口寧斎), poet
- Nawoko Noguchi, also known as Naoko Ken(研ナオコ), singer, actress and television personality
- Ryu Noguchi (野口竜), manga artist and designer
- Ujo Noguchi (野口雨情), author
- Yasutada Noguchi (野口安忠), athlete
- Yataro Noguchi (野口弥太郎), painter
- Yone Noguchi (野口米次郎), poet and father of Isamu Noguchi
- Yoshiyuki Noguchi (野口祥順), baseball playe
- Yukio Noguchi (野口悠紀雄), economist