The 1998 Tasmanian state election was held on Saturday, 29 August 1998 in the Australian state of Tasmania to elect 25 members of the Tasmanian House of Assembly. The number of members was reduced from 35 to 25. The election used the Hare-Clark proportional representation system—five members were elected from each of five electorates. The quota required for election increased from 12.5% to 16.7%.