As well as a share of the 1981 Nobel Prize in Physics, Siegbahn won the following awards:
* 1945 Lindblom Prize
* 1955, 1977 Björkén Prize
* 1962 Celsius Medal
* 1971 Sixten Heyman Award, University of Gothenburg
* 1973 Harrison Howe Award, Rochester 
* 1975 Maurice F. Hasler Award, Cleveland
* 1976 Charles Frederick Chandler Medal, Columbia University, New York 
* 1977 Torbern Bergman Medal
* 1982 Pittsburgh Award of Spectroscopy