William Geoffrey Cahill | |
|---|---|
 Commissioner Cahill, seated, circa 1905 | |
| Commissioner of the Queensland Police Service | |
| In office 1905–1916 | |
| Preceded by | William Parry-Okeden |
| Succeeded by | Frederic Urquhart |
| Personal details | |
| Born | 7 November 1854 Strokestown, County Roscommon, Ireland |
| Died | 25 April 1931 (aged 76) Newmarket, Queensland, Australia |
| Profession | Police officer, soldier |
| Military service | |
| Allegiance | Colony of Queensland |
| Branch/service | Queensland Volunteer Rifles |
| Years of service | 1885–1905 |
| Rank | Major |
| Awards | Companion of the Order of St Michael and St George Volunteer Officers' Decoration |
William Geoffrey Cahill, CMG, VD (7 November 1854 – 25 April 1931) was a soldier, officer and Queensland Police Commissioner in Queensland, Australia