how many us presidents were assassinated

Four U.S. presidents have been assassinated while in office:

1. Abraham Lincoln (16th president) in 1865
2. James A. Garfield (20th president) in 1881
3. William McKinley (25th president) in 1901
4. John F. Kennedy (35th president) in 1963

These four presidents were fatally shot by assassins during their terms, marking the only successful presidential assassinations in U.S. history.