Ecthelion may refer to:
- Ecthelion (d. F.A. 510), an Elf of Gondolin, Lord of the House of the Fountain, and slayer of the Balrog Gothmog.
- Ecthelion I (T.A. 2600 – 2698), the seventeenth Ruling Steward of Gondor.
- Ecthelion II (T.A. 2886 – 2984), the twenty-fifth Ruling Steward of Gondor and paternal grandfather of Boromir and Faramir.