This is a list of books that topped The New York Times best-seller list in 1945.
The following list ranks the number-one best-selling fiction books. Eight books topped the list that year, the longest on top being The Green Years, which dominated the winter months (18 weeks including 1 week in 1944). Other particularly popular titles included A Lion is in the Streets (10 weeks on top) and The Black Rose (17 weeks including 4 in 1946).
The following list ranks the number-one best-selling nonfiction books.