Viktor Schmieden (19 January 1874 – 11 October 1945) was a German surgeon born in Berlin.
In 1897 he earned his medical doctorate from the University of Bonn, and subsequently worked in hospitals in Göttingen, Berlin and Bonn. Later he was a professor at the Universities of Halle (from 1913) and Frankfurt (from 1919).
Schmieden is remembered for his work with Franz Volhard (1872-1950) in the establishment of pericardectomy for the treatment of constrictive pericarditis. Historically this procedure was referred to as "Schmieden's operation". He also made important contributions towards the treatment of hydrocephalus, and in 1926 identified that polyps of the colon were a precursor of colorectal cancer. He was a Generalarzt in the Wehrmacht during World War II.