| Alongside: | Henry Bankes |
| Office: | Member of Parliament for Corfe Castle |
| Term Start: | 1807 |
| Term End: | 25 August 1815 |
| Birth Date: | 1756 |
| Death Date: | 25 August 1815 |
| Party: | Tory |
| Education: | Eton College |
| Alma Mater: | Trinity College, Cambridge |
| Office1: | Member of Parliament for Wootton Bassett |
| Office2: | Member of Parliament for Arundel |
| Termend2: | 1784 |
| Termstart2: | 26 March 1781 |
| Termstart1: | 18 December 1802 |
| Termend1: | 1806 |
| Predecessor2: | Patrick Crauford |
| Successor2: | Charles Howard |
| Predecessor1: | Henry St John |
| Successor1: | Robert Knight |
| Successor: | George Bankes |
| Predecessor: | Nathaniel Bond |
Peter William Baker (1756 – 25 August 1815) was an English politician who was Member of Parliament for Corfe Castle, Wootton Bassett and Arundel.[1]
He was High Sheriff of Dorset from 1787 to 1788.