Margaret Kernochan Leech (November 7, 1893 – February 24, 1974), also known as Margaret Pulitzer, was an American historian and fiction writer. She won the Pulitzer Prize for History both in 1942 (Reveille in Washington, Harper) and in 1960 (In the Days of McKinley, Harper).
She started her writing career for the Condé Nast publishing company before World War I. Leech also worked in advertising and publicity. After the war, she became friendly with members of the Algonquin Round Table, including critic-raconteur Alexander Woollcott. She was an associate of some of the wittiest and most brilliant men and women of literature that spent time at the Algonquin Hotel in Manhattan.
In the Days of McKinley is a biography of President William McKinley, carefully told in minute detail, and he is shown as a more attractive person and better president than some have depicted him. In addition to the history Pulitzer, the book was awarded the Bancroft Prize in 1960.