Louisa Ulrika of Prussia (Swedish: Lovisa Ulrika; German: Luise Ulrike) (1720—1782) was queen of Sweden between 1751 and 1771. She was the daughter of Frederick William I of Prussia and his wife Sophia Dorothea of Hanover, and was thus the sister of Friedrich II of Prussia.
Ulrika married in 1744 to Friedrich von Holstein-Gottorp, who after his election in 1751 reigned as King Adolf Frederick of Sweden. They had the following children:
- (Stillborn) (1745)
- Gustav III (1746-1792)
- Charles XIII (1748-1818)
- Fredrik Adolf (1750-1803)
- Sophia Albertine (1753-1829)
