3E

3E or 3-E may refer to:

• 3e, general entertainment channel in Ireland
• 3rd meridian east
• Third edition in the Editions of Dungeons & Dragons
• NY 3E, alternate name for New York State Route 104
• OK-3E, abbreviation for Oklahoma State Highway 3
• 3E, a model of Toyota E engine
• 3^e, an abbreviation for 3ème, the third ordinal number in the French language
• 3Ε (Tria Epsilon), an abbreviation for the Coca-Cola Hellenic Bottling Company (Greek: Coca-Cola Ελληνική Εταιρείدتα Εμφιαλώσεως)