List of The New York Times number-one books of 2019

The American daily newspaper The New York Times publishes multiple weekly lists ranking the best-selling books in the United States. The lists are split in three genres—fiction, nonfiction and children's books. Both the fiction and nonfiction lists are further split into multiple lists.

Fiction
The following list ranks the number-one best-selling fiction books, in the combined print and e-books category.

The most frequent weekly best seller of the year was Where the Crawdads Sing by Delia Owens with 25 weeks at the top of the list.

Nonfiction
The following list ranks the number-one best-selling nonfiction books, in the combined print and e-books category.

The most frequent weekly best seller of the year was Becoming by Michelle Obama with 15 weeks at the top of the list; it was also a best seller for the last five weeks in 2018.