Dr. Kurt R. Mattusch, 81, a retired State Department official who was a long-time resident of Fairfax County, died Friday at Commonwealth Doctors Hospital in Fairfax after a stroke.

Dr. Mattusch moved to Northern Virginia in the early 1940s. During World War II, he worked as a consultant to the Foreign Economic Administration and the Board of Economic Welfare.

Following the war, he worked for several years for the Civil Administration Division of the Army in Berlin and the Allied Control Council.

Dr. Mattusch joined the State Department in 1949 as a senior analyst dealing with India and South Asia.

In 1959, he went to Korea with the International Cooperation Administration. Three years later he retired from the government and helped establish the American-Korean Foundation's Korean Economic Research Center where he worked until retiring in 1963.

During his years in Korea he also taught at the University of Maryland's Far East division there.

Following his retirement, he farmed in Fairfax County, and painted and exhibited water color paintings.

Dr. Mattusch was a native of Schoenebeck, Germany, and first came to this country to earn a doctoral degree at the University of Wisconsin in the mid 1920s.

He worked as a consultant to the State Department in Berlin before moving to this country in 1937.

He was a research assistant at Yale University, a consultant to Fortune Magazine, and a New York correspondent for the Deutsche Allgemeine Zeitung, before coming to Washington.

Survivors include his wife, Harriet C., of the home in Clifton, Va., and a daughter, Dr. Carol C. Mattusch, of Clifton.

The family suggests that expressions of sympathy be in the form of contributions to the American School of Classical Studies at Athens, Alumni Centennial Appeal, 21 Stoneridge Road, Durham, N.C. 27705. CAPTION: Picture, KURT R. MATTUSCH