| William Belbin | |
| Office: | Member of the Tasmanian House of Assembly for South Hobart |
| Term Start: | 6 September 1871 |
| Term End: | May 1891 |
| Predecessor: | New seat |
| Successor: | Edward Giblin |
| Birth Date: | 1825 2, df=yes |
| Birth Place: | Van Diemen's Land |
| Death Place: | North Sydney, New South Wales |
| Occupation: | Timber merchant, shipowner |
William Belbin (7 February 1825 – 26 June 1892) was an Australian politician.
Belbin was born in Tasmania in 1825. In 1871 he was elected to the Tasmanian House of Assembly, representing the seat of South Hobart. He served until 1891. He died in 1892 in Sydney.[1]