Princess Sophia Albertina of Sweden (Sophia Maria Lovisa Fredrika Albertina; 8 October 1753 – 17 March 1829) was the last Princess-Abbess of Quedlinburg Abbey, and as such reigned as vassal monarch of the Holy Roman Empire.
Sophia Albertina was the daughter of King Adolf Frederick of Sweden and Louisa Ulrika of Prussia. She was thus a princess of Sweden, a princess of Holstein-Gottorp and a sister to Gustav III of Sweden. She was a member of the Accademia di San Luca. When her brother Charles XIII of Sweden and the rest of the royal family also became Norwegian royalty in 1814, that did not include Sophia Albertina who then officially was called Royal Princess (of no country).
She was given her two names as namesake of her two grandmothers: the Prussian Queen Sophia Dorothea of Hanover and Margravine Albertina Frederica of Baden-Durlach.