| Other Names: | Julia Stroganova |
| Birth Name: | Juliana Luisa Maria de Almeida e Oyenhausen |
| Birth Date: | 20 August 1782 |
| Spouse: | Aires José Maria de Saldanha Albuquerque Coutinho Matos e Noronha, 2nd Count of Ega (married 1800–?) Grigory Alexandrovich, count of Stroganov |
| Mother: | Leonor de Almeida Portugal, Marquise of Alorna |
| Father: | Carlos Pedro Maria José Augusto, count of Oyenhausen-Gravenburg |
Juliana Luisa Maria de Almeida e Oyenhausen,[1] also known as Julia Stroganova (20 August 1782 – 2 November 1864), was a Portuguese noble and lady in waiting. Born to Leonor de Almeida Portugal, Marquise of Alorna and Carlos Pedro Maria José Augusto, count of Oyenhausen-Gravenburg, she was the official mistress of Jean-Andoche Junot, the regent of French-occupied Portugal in 1807–1808, and exerted political influence during her position as such.
She married Aires José Maria de Saldanha Albuquerque Coutinho Matos e Noronha, 2nd Count of Ega in 1800, and later married Count Grigory Alexandrovich Stroganov, a high-ranking member of Russian nobility.