REI is an American retail and outdoor recreation services corporation.

Rei or REI may also refer to:

People and fictional characters

Given name or nickname

• 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

• Rei (singer) (born 2004), Japanese rapper and singer, member of South Korean girl group Ive

• Eusébio (1942–2014), Portuguese footballer

• Pelé (1940–2022), Brazilian footballer

• Rei Halloran (born 2006), Japanese-American ice hockey goaltender

• Reihaneh Safavi-Naini, Canadian computer scientist

Surname

• 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

Transport

• Reigate railway station (National Rail station code REI), Surrey, England

• Redlands Municipal Airport (FAA LID airport code REI), San Bernardino County, California, United States

Other uses

• International Conference on Radiation Effects in Insulators

• Railway Engineering Institution, the professional institution for railway infrastructure and systems engineers and operators

• Reaction Engines Inc., an American aerospace manufacturer

• Rede de Emissoras Independentes, a defunct Brazilian television network

• rei, ISO 639-3 code for the 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*

See also

• Cristo Rei (disambiguation)

• Reis (disambiguation)

• Rey (disambiguation)

• Rei Rei, a video animation series