Oei
# Oei

OEI or Oei can refer to:

## OEI

* Obsidian Entertainment, Inc., a video game developer
* Organization of Ibero-American States, known by the Spanish and Portuguese-derived acronym, OEI
* Ozarks Entertainment, Inc., a former owner of the Dogpatch USA amusement park in the United States

## Oei

* Ōei, a Japanese era name spanning from 1394 to 1428

### Surname

* David Oei, Hong Kong-born American classical pianist
* Madame Wellington Koo (born Oei Hui-lan), Chinese-Indonesian international socialite and style icon, briefly First Lady of the Republic of China
* Oei Tiong Ham, Majoor-titulair der Chinezen, colonial Chinese-Indonesian tycoon in Southeast Asia
* Oei Wie Gwan, Chinese-Indonesian businessman and founder of Djarum
