William Bispham Propsting, CMG was an Australian lawyer and politician. He served as premier of Tasmania from 1903 to 1904. He was a member of the parliament of Tasmania for over 35 years and also served terms as Attorney-General of Tasmania and president of the Tasmanian Legislative Council.

The premier of Tasmania is the head of the executive government in the Australian state of Tasmania. By convention, the leader of the party or political grouping which has majority support in the House of Assembly is invited by the governor of Tasmania to be premier and principal adviser.