Ariyoshi (written: 有吉) is a Japanese surname. Notable people with the surname include:
- Chūichi Ariyoshi (有吉 忠一, 1873–1947), Japanese politician
- George Ariyoshi (有吉 良一, born 1926), American politician
- Hiroiki Ariyoshi (有吉 弘行, born 1974), Japanese comedian
- Koji Ariyoshi (有吉 幸治, 1914–1976), American labor unionist and activist
- Kyōko Ariyoshi (有吉 京子, born 1950), Japanese manga artist
- Michio Ariyoshi (有吉 道夫, born 1935), Japanese shogi player
- Saori Ariyoshi (有吉 佐織, born 1987), Japanese footballer
- Sawako Ariyoshi (有吉 佐和子, 1931–1984), Japanese writer