Friedrich Julius Rosenbach, also known as Anton Julius Friedrich Rosenbach, (December 16, 1842—December 6, 1923) was a German physician and microbiologist. He is credited for differentiating Staphylococcus aureus and Staphylococcus albus, which is now called Staphylococcus epidermidis, in 1884. He also described and named .Rosenbach's disease is also named in his honor.
Rosenbach was born in Grohnde an der Weser on December 16, 1842. He studied in Heidelberg, Göttingen, Vienna, Paris, and Berlin. He obtained his doctorate in 1867. He married Franziska Merkel on May 12, 1877. Rosenbach died on December 6, 1923, in Göttingen.