Merlo John Pusey (February 3, 1902 – November 22, 1985) was an American biographer and editorial writer. He won the Pulitzer Prize for Biography or Autobiography and the Bancroft Prize for his 1951 biography of Charles Evans Hughes.
A native of Woodruff, Utah, Pusey worked for The Washington Post from 1928 to 1971.
Pusey was a Latter-day Saint.
- The Supreme Court Crisis (Macmillan, 1937)
- Big Government: Can We Control It? (Harper, 1945)
- Charles Evans Hughes (Macmillan, 1951) – Pulitzer Prize
- Eisenhower, the President (Macmillan, 1956)
- The Way We Go to War (Houghton Mifflin, 1969)
- The U.S.A. Astride the Globe (Houghton Mifflin, 1971)
- Eugene Meyer (Knopf, 1974) – about Eugene Meyer
- Builders of the Kingdom, George A. Smith, John Henry Smith, George Albert Smith (Brigham Young University, c1981)
- Ripples of Intuition (Signature Books, Inc., 1986).
- "Merlo J. Pusey Dies; Justice's Biographer Won a Pulitzer Prize". The New York Times. November 24, 1985: 44.