Dorothea Maria Lösch, as married Theslöf, (1730 – 2 February 1799), Swedish master mariner. She was the first woman in Sweden to be given the rank of a sea captain.
Dorothea Maria Lösch took over and commanded the ship Armida to safety after its officers had been killed or abandoned it during the Battle of Svensksund 9 July 1790. For this act, she was awarded with the rank of a master mariner of the Swedish fleet, something unique for a woman of this period. Although this was a pure ceremonial title, she was nevertheless the first woman in such a position.