Oei

OEI or Oei can refer to:

OEI Institute for East European Studies 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 Theresa Oei, biomedical researcher Oei Tiong Ham, Majoor-titulair der Chinezen, colonial Chinese-Indonesian tycoon in Southeast Asia Oei Wie Gwan, Chinese-Indonesian businessman and founder of Djarum

See also Oey, a surname