Frieda Blell (4 September 1874, Brandenburg - 5 March 1951, Gauting) was a German landscape painter.
Blell was the daughter of Carl Blell, a deputy of the German Reichstag. Blell lived and worked in several locations, including Munich, São Paulo, the South Tyrol and Gauting. In 1913, she married her long-time companion, the expressionist Leo Putz. Blell served as the model for many of his paintings. From 1909 to 1914, they spent the Summers on the Chiemsee with their friends Clara Lotte von Marcard and Edward Cucuel who also featured her in a few of his works, including "Herbstsonne", a depiction of the young Blell in the park by the lake shore near Castel Hartmannsberg.
She painted numerous landscapes and pictures of flowers for Jugend.