| Konstantin Reichardt | |
| Birth Date: | 30 April 1904 |
| Birth Place: | Saint Petersburg, Russian Empire |
| Death Place: | New Haven, Connecticut |
| Nationality: | German, American |
| Doctoral Advisor: | Gustav Neckel |
| Academic Advisors: | Friedrich von der Leyen |
Konstantin Reichardt (30 April 1904 – 19 January 1976) was a Russian Empire-born American philologist who specialized in Germanic studies.
Konstantin Reichardt was born in Saint Petersburg, Russian Empire on 30 April 1904. His father was a merchant. From 1923 to 1927, Reichardt studied Indo-European linguistics, Germanic philology, Celtic philology and philosophy at the University of Berlin. He received his Ph.D. at Berlin 1927 under the supervision of Gustav Neckel. His thesis was on the skalds of the Viking Age.
From 1926 to 1927, Reichardt was a lecturer in Old Norse at the University of Berlin. From 1930 to 1931 he was an assistant of Friedrich von der Leyen at the University of Cologne. In 1930 he worked on the handling of German manuscripts at the Royal Library, Denmark. Reichardt was a assosicate professor of Nordic philology at the University of Leipzig from 1931 to 1937.
Reichardt emigrated to the United States in 1938, and subsequently served as visiting professor (1938-1939) and professor (1939-1945) of German and Nordic philology at the University of Minnesota. From 1942 to 1947 he was also professor of Russian language and literature at Minnesota. He became an American citizen in 1944. Since 1947, Reichardt was professor of German philology at Yale University. He died in New Haven, Connecticut on 19 January 1976.