Nellallitea "Nella" Larsen, born Nellie Walker (April 13, 1891 – March 30, 1964), was an American novelist of the Harlem Renaissance. Working as a nurse and a librarian, she published two novels, Quicksand (1928) and Passing (1929), and a few short stories. Though her literary output was scant, she earned recognition by her contemporaries.

A revival of interest in her writing has occurred since the late 20th century, when issues of racial and sexual identity have been studied. Her works have been the subjects of numerous academic studies, and she is now widely lauded as "not only the premier novelist of the Harlem Renaissance, but also an important figure in American modernism."