Periodic elections for the Tasmanian Legislative Council were held on 5 May 2018.

Prosser was a new division created in the 2017 redistribution, and was vacant pending this election.

The seat of Hobart, based in the Tasmanian capital of Hobart, has been held by independent member Rob Valentine since 2012.

The east coast seat of Prosser was created in the redistribution of electoral boundaries which came into effect on 5 August 2017.

No member was assigned to the seat at its creation, instead the members for the abolished divisions of Apsley (Tania Rattray) and Western Tiers (Greg Hall) were both allocated to the new McIntyre until the expiry of Hall's term at this election.