| William Richard Sadler | |
| Office: | Member of the Pennsylvania Senate from the 18th district |
| Term Start: | 1847 |
| Term End: | 1850 |
| Predecessor: | Thomas Erskine Carson |
| Successor: | Timothy Ives |
| Birth Date: | 1816 |
| Death Date: | 1853 |
| Party: | Whig |
| Residence: | York Springs, Adams County, Pennsylvania |
| Children: | John Durbin Sadler |
William Richard Sadler was an American politician from Pennsylvania who represented the 18th district of the Pennsylvania Senate from 1847 to 1850.[1]
William Sadler's son, John Durbin Sadler, served as a Lieutenant in the Union Army during the American Civil War, being killed in the Battle of Antietam.[2]