Science 
In detail: 25 Nobel Prize Winners were Swiss citizens when they received the Prize. 2 others got Swiss citizenship some years afterwards. For 1 his father gave back Swiss citizenship when he was 17 years old.
Another 11 foreign scholars have finished their studies or teached at the ETH (Federal Institute of Technology) or at the University of Zurich, and 7 foreign professors teached at Geneva and Basel. In addition 47 other foreign scholars have visited Switzerland, mostly for one to three years, for studying or research, e. g. 16 at the CERN, Geneva, 9 at the University of Geneva, 9 at the University of Zurich, 9 at the ETH, Zurich, 4 at the Biozentrum Basel and 3 at the IBM Research Laboratory in Rüschlikon.
In addition 8 foreign winners of the Nobel Peace Price and 9 foreign authors lived for some time in Switzerland.
Some other Nobel Prize Winners (Woodward, Eccles, Sharp, Molina) stand also in relation to Switzerland.
Since the IKRK (International Committee of the Red Cross) got three times the Nobel Peace Price and the UNHCR (Office of the United Nations High Commissioner for Refugees) twice, we have a total of 9 times for international organizations in Switzerland.
In geographical perspective 50 Nobel Prizes are associated with Zurich and the suburbs, 50 with Geneva, 17 with Basel and 12 with Berne.
27 Swiss Nobel Prize Winners
1901 Jean Henri Dunant: nobel prize for peace
1902 Elie Ducommun und Charles Albert Gobat:
nobel prize for peace
1909 Emil Theodor Kocher: medicine
1913 Alfred Werner (* Mülhausen; since 1894 Swiss): chemistry
1919 Carl Friedrich Georg Spitteler: literature
1920 Charles-Edouard Guillaume: physics
1921 Albert Einstein (* Ulm; Swiss 1901-1955): physics
1937 Paul Karrer: chemistry
1939 Leopold Ruzicka (* Vukovar, Swiss since 1917): chemistry
1946 Hermann Hesse (* Calw, Swiss since 1923): literature
1948 Paul Hermann Müller: medicine
1949 Walter Rudolf Hess: medicine
1950 Tadeus Reichstein (* Wloclawek; Swiss since 1916): medicine
1951 Max Theiler (seit 1922 in USA): medicine
1952 Felix Bloch (seit 1934 in den USA): physics
1957 Daniel Bovet (seit 1947 in Italien): medicine
1975 Vladimir Prelog (* Sarajewo; Swiss since1959): chemistry
1978 Werner Arber: medicine
1986 Heinrich Rohrer: physics
1987 Karl Alexander Müller: physics
1991 Richard Robert Ernst: chemistry
1992 Edmond Henri Fischer (* Schanghai; Swiss since1947: medicine
1996 Rolf Zinkernagel: medicine
2002 Kurt Wüthrich: chemistry
Foreigners who became Swiss citizens
1933 Paul Adrien Maurice Dirac (* Bristol; 1902-1919 Swiss): physics
1945 Wolfgang Pauli (* Wien, Swiss since 1949): physics
1988 Jack Steinberger (* Bad Kissingen; Swiss since 2000): physics
27 Swiss Nobel prize winners
Universities
No fewer than 113 Nobel Prize winners stand in relation to Switzerland. The most famous of them is Albert Einstein, citizen of Zurich, according to "Time Magazine" the "Man of the (20th) Century". In addition 9 times international organizations, residing in Geneva, have got the Nobel Peace Price.The often discussed problem of citizenship reflects the peculiarity of Switzerland.