| Honorific-Prefix: | Major-General |
| William Wilby | |
| Order: | 26th |
| Office: | General Officer Commanding, Ceylon |
| Term Start: | 1879 |
| Term End: | 1882 |
| Predecessor: | John Alfred Street |
| Successor: | John Chetham McLeod |
| Birth Date: | c.1820 |
| Death Date: | 15 December 1893 |
| Death Place: | London |
| Allegiance: |  United Kingdom |
| Rank: | Major-General |
| Commands: | General Officer Commanding, Ceylon |
| Battles: | Indian Rebellion British Expedition to Abyssinia |
| Awards: | Companion of the Order of the Bath |
Major-General William Wilby CB (c.1820 - 15 December 1893) was the General Officer Commanding, Ceylon.
Wilby was commissioned as an ensign in the British Army on 27 May 1836.[1] He saw action in the Crimean War and commanded the right wing of his regiment at Gujarat and Sindh during the Indian Rebellion in 1857.[1] He was present at the Battle of Aroghee and at the Battle of Magdala in April 1868 during the British Expedition to Abyssinia[1] and went on to be General Officer Commanding, Ceylon from 1879[2] to 1882. He afterwards served as colonel of the King's Own (Royal Lancaster Regiment) (1892–93).[1]