John Ponsonby
John Ponsonby is the name of the following people:
- John Ponsonby, 1st Viscount Ponsonby (around 1770–1855), British diplomat
- John Ponsonby, 4th Earl of Bessborough (1781–1847), British ambassador to the Austrian monarchy
- John Ponsonby, 5th Earl of Bessborough (1809–1880), British politician
- John Ponsonby (General) (1866–1952), British general and division commander in World War I.