
Grover Cleveland was the only living ex-president on two separate occasions. (So was Taft.)
We're used to there being so many living ex-presidents, but this wasn't always so. A number of ex-presidents were alone in their retirement.
- George Washington, from Adams' inauguration in March 1797 to his death in December 1799.
- John Adams, from Jefferson's inauguration in March 1801 to Madison's inauguration in March 1809.
- John Quincy Adams, from Madison's death in June 1836 to Van Buren's inauguration in March 1837.
- Andrew Johnson, from Fillmore's death in August 1874 to his own death in July 1875.
- Ulysses S. Grant, from Hayes' inauguration in March 1877 to Garfield's inauguration in March 1881.
- Rutherford B. Hayes, from Arthur's death in November 1886 to Harrison's inauguration in March 1889.
- Grover Cleveland, from Hayes' death in January 1893 to his inauguration in March 1893.
- Benjamin Harrison, from Cleveland's inauguration in March 1893 to McKinley's inauguration in March 1897.
- Grover Cleveland, from Harrison's death in March 1901 to his own death in June 1908.
- Theodore Roosevelt, from Taft's inauguration in March 1909 to Wilson's inauguration in March 1913.
- William Howard Taft, from Roosevelt's death in January 1919 to Harding's inauguration in March 1921.
- William Howard Taft, from Wilson's death in February 1924 to Hoover's inauguration in March 1929.
- Calvin Coolidge, from Taft's death in March 1930 to his own death in January 1933.
- Herbert Hoover, from Roosevelt's inauguration in March 1933 to Eisenhower's inauguration in January 1953.
- Lyndon Johnson, from Truman's death in December 1972 to his own death in January 1973.
- Richard Nixon, from his resignation in August 1974 to Carter's inauguration in January 1977.