Wei or WEI may refer to:
States Wey (state) (衛, 1040–209 BC), Wèi in pinyin, but spelled Wey to distinguish from the bigger Wèi of the Warring States Wei (state) (魏, 403–225 BC), one of the seven major states of the Warring States period Cao Wei (曹魏, 220–266), ruled North China during the Three Kingdoms period Ran Wei (冉魏, 350–352), short-lived Sixteen Kingdoms period state Northern Wei (北魏, 386–535), ruled North China during the Southern and Northern Dynasties, later split into: Western Wei (西魏, 535–557) Eastern Wei (東魏, 534–550) Zhai Wei (翟魏, 388–392), state of Dingling/Gaoche ethnicity in China
Places Wei River, a main tributary of the Yellow River Wei County, Handan (魏县), Hebei, China Wei County, Xingtai (威县), Hebei, China
People
Wei (given name), different variations of Chinese given names Wei (surname), various Chinese surnames (魏, 衛, 尉, 蔿, 韋) Wei Wei (disambiguation)
Astronomy One of three Chinese constellations: Wěi (), meaning Tail Wēi (), meaning Rooftop Wèi (), meaning Stomach Wèi (), the Chinese name for the star Delta Herculis Wei, a name sometimes used for Epsilon Scorpii, after the Tail constellation
Other uses WEi, a South Korean boy group Wei (rank), a company-grade officer in Chinese armed forces Wei (value token), a subunit of the Ether value token on the Ethereum blockchain Wau Ecology Institute, Wau, Papua New Guinea Web Environment Integrity, a Web API proposed by Google Windows Experience Index (WEI) score, a measure of the user-perceived performance of a computer running Microsoft Windows Weipa Airport (IATA code: WEI), Weipa, Queensland, Australia Wei Empire, a fictional state and planetary romance series of Yulia Latynina
See also Way (disambiguation) Wee (disambiguation) Wey (disambiguation) Whey (disambiguation)