| William Henry Pettett | |
| Order: | 3rd |
| Office: | Mayor of Hawthorn |
| Term Start: | 1863 |
| Term End: | 1864 |
| Predecessor: | Dugald McDougall |
| Successor: | Lauchlan Mackinnon |
| Term Start2: | 1 November 1864 |
| Term End2: | 1 December 1871 |
| Predecessor2: | Thomas Power |
| Successor2: | Thomas Ferrier Hamilton |
| Birth Date: | 4 September 1814 |
| Birth Place: | Greenwich, London, England |
| Death Place: | Warra Warra Station, Victoria, Australia |
William Henry Pettett (4 September 1814 - 2 December 1871) was an English-born Australian politician who served as the Mayor of Hawthorn and as a member of the Legislative Council of Victoria for Southern Province.
Pettett was born in Greenwich, London, in 1814. He moved to Australia arriving in Tasmania in 1832 and he moved to Victoria in 1837 landing in Geelong. He settled in Little River and became a shepherd and in 1838 he was hired as a manager for William John Turner Clarke working for him until 1842.[1]
He later moved to Hawthorn where he worked as a contractor and in 1863 he was elected as Mayor of Hawthorn and served for one year. In November 1864 he was elected to the Legislative Council of Victoria for Southern Province and served in the role until 1871.[1]
In later life Pettett settled at Warra Warra station near Stawell which he owned. He suffered a lengthy illness in 1871 and died on December 4.[2]