Rei

REI is an American retail and outdoor recreation services corporation.

Rei or REI may also refer to:

• Rei (given name), including a list of people and fictional characters with the name
• Rei (footballer) (1912–1986), Brazilian footballer
• Rei (wrestler), Hong Kong professional wrestler
• Eusébio (1942–2014), Portuguese footballer
• Pelé (1940–2022), Brazilian footballer
• Reihaneh Safavi-Naini, Canadian computer scientist

• Aleksander Rei (1900–1943), Estonian politician
• August Rei (1886–1963), Estonian politician
• Leino Rei (born 1972), Estonian actor and theatre director
• Sofia Rei, Argentine musician

• International Conference on Radiation Effects in Insulators
• Reaction Engines Inc., an American aerospace manufacturer
• Rede de Emissoras Independentes, a defunct Brazilian television network
• Redlands Municipal Airport, serving San Bernardino County, California
• Reli language, spoken in India
• Remote error indication, in synchronous optical networking
• Reproductive endocrinology and infertility, a surgical subspecialty of obstetrics and gynecology
• Rei, a story arc of the anime Higurashi When They Cry
• Rochester Electronics Incorporated, a semiconductor manufacturer*

• Cristo Rei (disambiguation)
• Reis (disambiguation)
• Rey (disambiguation)
• Rei Rei, a video animation series