- National Institute of Arts and Letters award (1929)
- Butler Gold Medal (1929)
- LL.D. from the University of Wisconsin (1930)
- LL.D. from Columbia University (1930)
- Gold Medal of the Accademia dei Lincei (1932)
- LL.D. from the University of Paris (1932)
- LL.D. from Harvard University (1933)
- LL.D. from Yale University (1933)
- LL.D. from the University of Pennsylvania (1934)
- LL.D. from Northwestern University (1934)
- LL.D. from Princeton University (1934)
- LL.D. from the University of Michigan (1935)
- LL.D. from the University of North Carolina at Chapel Hill (1937)
- LL.D. from Duke University (1937)
- LL.D. from the University of California, Berkeley (1937)
- LL.D. from the University of Chicago (1938)
In addition, he received numerous honorary degrees from universities and colleges across the United States and abroad.