List of The New York Times number-one books of 1931

This is a list of books that topped The New York Times best-seller list in 1931.

This was the first year that the list was published, though it was not yet a national list. Throughout the 1930s the list reflected sales in the New York City area.

Fiction
The following list ranks the number-one best-selling fiction books.

Nonfiction
The following list ranks the number-one best-selling nonfiction books.