| State1: | Alabama |
| District1: | 1st |
| Term Start1: | March 4, 1855 |
| Term End1: | March 3, 1857 |
| Predecessor1: | Philip Phillips |
| Successor1: | James Adams Stallworth |
| Birth Date: | December 1812 |
| Birth Place: | Huntsville, Alabama |
| Death Place: | Mobile, Alabama |
| Party: | Know Nothing |
Percy Walker (1812–1880) was an American politician from Huntsville, Alabama.
He was graduated from the medical department of the University of Pennsylvania at Philadelphia in 1835. He began practicing medicine in Mobile, Alabama. He served in the campaign against the Creek Indians. He studied law and was admitted to the bar. He practiced law in Mobile. He served as State's Attorney for the 6th judicial district.
He was elected to the State House of Representatives in 1839, 1847, and 1853, elected as a candidate of the American Party to the Thirty-fourth Congress (4 March 1855 – 3 March 1857). He declined to be a candidate for renomination in 1856.
He died in Mobile on 31 December 1880, and was interred in Magnolia Cemetery.