Queen Frederica or Queen Frederika may refer to:

Frederica Louisa of Hesse-Darmstadt (1751–1805), Queen of Prussia Frederica of Mecklenburg-Strelitz (1778–1841), Queen of Hanover Frederica of Baden (1781–1826), Queen of Sweden Frederica of Hanover (1917–1981), Queen of the Hellenes , a Chandris Line cruise ship