| Office: | 4th Assistant Secretary of State for Economic Affairs |
| Term Start: | March 14, 1957 |
| Term End: | September 26, 1957 |
| Preceded: | Samuel C. Waugh |
| Succeeded: | Thomas C. Mann |
| Death Date: | 1980 |
| Preceded1: | Thomas C. Mann |
| Succeeded2: | Murat W. Williams |
| Termstart1: | September 7, 1957 |
| Termend1: | December 18, 1960 |
| Office1: | US Ambassador to El Salvador |
| President1: | Dwight D. Eisenhower |
Thorsten Valentine Kalijarvi (December 22, 1897 June 5, 1980) served as Assistant Secretary of State for Economic and Business Affairs in the United States under President Dwight D. Eisenhower in 1957.[1] He also served as Ambassador to El Salvador from 1957 to 1961.
Kalijarvi was born in Gardner, Massachusetts on December 22, 1897.[2] He graduated with a bachelor's and master's degree from Clark University in 1923. In 1935, Kalijarvi received his doctorate degree from the University of Berlin.[3] He also studied at The Hague Academy of International Law and the Geneva School of International Studies. From 1927 to 1945, he taught government at the University of New Hampshire and served as the head of the political science department. He also lectured at American University and Johns Hopkins University.
Kalijarvi started work in Washington in 1947 as a consultant on European affairs for the Library of Congress and the Senate Foreign Relations Committee. In 1950, he joined the Department of State. He worked as an ambassador from 1957 to 1960 and then retired in 1961. He continued to work in Washington, serving on different committees for the U.S. Chamber of Commerce.
Kalijarvi died on June 5, 1980 in Alexandria, Virginia.