- Source: Nishiguchi
- Ryo Nishiguchi
- Kiyofumi Ohno
- Ryo
- AC Nagano Parceiro
- Stasiun Yokohama
- Dai Sentai Goggle V
- Yaoi-Con
- Daftar stasiun kereta api di Jepang: K-L
- Toyota Auto Body
- Kazoku Game
- Akira Nishiguchi
- Nishiguchi
- Daisuke Nishiguchi
- Shinjuku-nishiguchi Station
- Ikebukuro Nishiguchi Park
- Reo Nishiguchi
- Fumiya Nishiguchi
- Shigeki Nishiguchi
- Ryo Nishiguchi
- Sumiyoshi-kai
Nishiguchi (written: 西口) is a Japanese surname. Notable people with the surname include:
Akira Nishiguchi (西口 彰, 1925–1970), Japanese serial killer and fraudster
Daisuke Nishiguchi (西口 大輔, born 1988), Japanese footballer
Fumiya Nishiguchi (西口 文也, born 1972), Japanese baseball player
Ryo Nishiguchi (西口 諒, born 1990), Japanese footballer
Yasuo Nishiguchi (西口 泰夫, born 1943), Japanese businessman