Only the New Democrats and the Saskatchewan Party elected members to the assembly in 2007, but several other parties are hoping to change that.
Besides the Big Two, some of the parties fielding candidates, and their leaders, include:
Leader: Ryan Bater
Saskatchewan Liberal Party leader Ryan Bater is expected to run in The Battlefords constituency.
An economic developer, he was officially confirmed as party leader two years ago.
In 2007, he ran in the same riding and came in third. New Democrat Len Taylor is the incumbent.
Leader: Victor Lau
Lau, who describes himself as a union activist for more than two decades, has run for the Green party in numerous elections.
This time, he's running in Regina Douglas Park. The incumbent in the constituency is New Democrat leader Dwain Lingenfelter.
Lau was elected leader of his party last month following the resignation of Larissa Shasko.
Progressive Conservative Party
Leader: Rick Swenson
Swenson, who was a cabinet minister in the PC government of Grant Devine, will be running in Moose Jaw North.
He's one of two candidates the party is fielding in this election.
Provincewide, the PCs failed to elect any members in the last election.
Swenson has been critical of the NDP for closing rural hospitals and of the Sask. Party, which he says carried on the work of the NDP.
Western Independence Party of Saskatchewan
Leader: Dana Arnason
Arnason, who was born in 1957, will be running in Biggar.
He has worked in film processing, computers, the real estate industry and sales.
The party's website says it offers the people of Saskatchewan "a real alternative to living under the Central Canadian Establishment. We believe that we can only achieve our true potential in a free and truly democratic West."