Margaret Kernochan Leech also known as Margaret Pulitzer, was an American author and historian, who won two Pulitzer Prizes in history, for her books Reveille in Washington (1942) and In the Days of McKinley (1960).

She was born in Newburgh, New York, obtained a B.A. from Vassar College in 1915, and worked for fund-raising organizations during World War I, including the American Committee for Devastated France.

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 1928 she married Ralph Pulitzer, publisher of the New York World newspaper. (His father, Joseph Pulitzer, had established the Pulitzer Prize by a bequest to Columbia University.) They had one daughter, Susan.

Leech also wrote three novels: The Back of the Book (1924), Tin Wedding (1926), and ,i>The Feathered Nest (1928).

Leech died of a stroke in New York City at age 80.