William IV
| Year Start | 1830 |
| Year End | 1837 |
| Date of Birth | 21st August 1754 |
| Date of Death | 20th June 1837 |
King William IV was king of Great Britain and Ireland from 1830. The King became known as the Sailor King after joining the navy from just 13 years old. During his reign King William IV saw the passing of the infamous Reform Act of 1832.
King William IV is known for abolishing slavery during his reign as king. When William died he has no children, so the thrown was passed on to his neice, Queen Victoria.