1 University of Cambridge
2 University of Chicago
3 Columbia University
4 Massachusetts Institute of Technology
5 University of California, Berkeley
6 University of Oxford
7 University of Paris
8 Harvard University
9 University of Heidelberg
10 Yale University
11 Georg August University of Göttingen
12 Cornell University
13 Humboldt University
14 New York University
15 Johns Hopkins University
16 Ludwig Maximilians University of Munich
17 Princeton University
18 California Institute of Technology
19 ETH Zurich
20 Stanford University
21 University of Pennsylvania
22 University of Illinois at Urbana–Champaign
23 University of Manchester
24 Rockefeller University
25 Washington University
26 University College London
27 University of Zurich

Source:

http://en.wikipedia.org/wiki/List_of_Nobel_laureates_by_university_affiliation#Harvard_University