Saix, Saïx or SAIX may refer to:

• Saïx, a commune in Occitania, France

• Saix, Vienne, a commune in the Nouvelle-Aquitaine region of France

• Saïx (Kingdom Hearts), a fictional video-game character

• Tyler De Saix, pseudonym of Irish author Henry De Vere Stacpoole (1863–1951)

• SAIX, the South African Internet Exchange

See also

• Le Saix, a commune in the Hautes-Alpes department, France

• Seix, a commune in the Occitanie region of France