* 1884: Honorary Doctor of Literature degree from Oxford University.
* 1888: Honorary Doctor of Laws degree from Yale University.
* 1901: Honorary Doctor of Letters degree from the University of Missouri.
* 1902: Gold Medal from the National Institute of Arts and Letters.
* 1904: Honorary Doctor of Literature degree from the University of Pennsylvania.
* 1907: Mark Twain Prize for Humor from the American Academy of Humor.
* 1910: Honorary Doctor of Literature degree from Smith College.
* 1910: Medal of Honor for Literature from the National Institute of Arts and Letters.
* 1911: Pulitzer Prize for Literature for his autobiography.