HEI

Hei or HEI may refer to:
Places, companies, organizations

Heilongjiang, a province in the People's Republic of China
Graduate Institute of International and Development Studies (Institut universitaire de hautes études internationales et du developpement), in Geneva, Switzerland
Hautes études d'ingénieur, engineering school located in Lille, France
Heighington railway station in England (National Rail station code HEI)
HEI Hospitality, an American hotel owner and operator
Hawaiian Electric Industries, electricity supplier in the state of Hawaii (US)
Health Effects Institute, a non-profit focused on the health effects of air pollution

Non-English

Hello in Finnish and Scandinavian (Norwegian, Swedish, Danish)
Qi, an active principle forming part of any living thing (Cantonese hei)
Black (Mandarin Chinese hei)
An informal
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