- Born: January 29, 1843 in Niles, Ohio
- Parents: William McKinley Sr. (iron founder) and Nancy Campbell Allison McKinley
- Spouse: Ida Saxton McKinley (married 1871)
- Children: Katherine “Katie” McKinley (1871-1875), Ida McKinley (1873-1873)
- Died: September 14, 1901 (assassinated by Leon Czolgosz at age 58)
- Highest Office: 25th President of the United States of America (USA) (1897-1901)
- Other Notable Positions: U.S. Representative from Ohio (1877-1884, 1885-1891), Governor of Ohio (1892-1896)
- Party Affiliation: Republican Party
- Historical Note: Led the nation during the Spanish-American War, which established America as a world power. Champion of protective tariffs and the gold standard. His presidency marked the beginning of the American Century and overseas expansion. Second president to be assassinated. His death brought Theodore Roosevelt to power.