Oe or OE may refer to:
The Organisation for Economic Co-operation and Development (OECD; French: Organisation de coopération et de développement économiques, OCDE) is an intergovernmental economic organisation with 36 member countries, founded in 1961 to stimulate economic progress and world trade.
The Oedipus complex (also spelled Œdipus complex) is a concept of psychoanalytic theory. Sigmund Freud introduced the concept in his Interpretation of Dreams (1899) and coined the expression in his A Special Type of Choice of Object made by Men (1910).
Oei Hui-lan (Chinese: 黃蕙蘭; Pe̍h-ōe-jī: Ûiⁿ Hūi-lân; 2 December 1889 – 1992), known as Madame Wellington Koo, was a Chinese-Indonesian international socialite and style icon, and, from late 1926 until 1927, the First Lady of the Republic of China.
Oedipus (UK: , US: ; Greek: Οἰδίπους Oidípous meaning 'swollen foot') was a mythical Greek king of Thebes.
Oedogonium is a genus of filamentous, free-living green algae, first discovered in the freshwaters of Poland 1860 by W.
Oecusse, also variously Oecussi, Ocussi, Oekussi, Oekusi, Okusi, Oé-Cusse, and formerly Ambeno and Oecussi-Ambeno, is both a municipality (Portuguese: Município Oecusse, Tetum: Munisípiu Oekusi) and a Special Administrative Region (SAR) (Portuguese: Região Administrativa Especial de Oecusse, RAEO; Tetum: Zona Espesial Ekonomiko Sosial no Merkadu Oekusi, ZEESM), and was formerly a district, of East Timor.