Olga Princess of Hanover
- Category : 1884-births
- Type : MGP
- Profile : 5/1 - Heretical / Investigator
- Definition : Single
- Incarnation Cross : LAX Cycles 1
Princess of Hanover and Cumberland, Princess of Great Britain and Ireland, and Duchess of Brunswick-Lüneburg, as the youngest daughter of Ernst August, Crown Prince of Hanover (1845–1923) and Princess Thyra of Denmark (1853–1933), the youngest daughter of King Christian IX of Denmark (1818–1906) and Louise of Hesse-Kassel (1817–1898).
Princess Olga resided with her family at Gmunden and remained unmarried throughout her life. In 1958, shortly before Olga's death, her nephew Ernest Augustus IV, Prince of Hanover and his wife Princess Ortrud of Schleswig-Holstein-Sonderburg-Glücksburg named their daughter, born in 1958, Olga in her honour. Olga died of natural causes at her home, Hubertihaus, near Gmunden on 21 September 1958, aged 74.