The party said Monday that 86 per cent of the 3,727 party members who participated in a recent mail-in vote support abolishing the Senate.
The party organized the membership referendum after Premier Brad Wall said reforming the Senate to make it "elective, effective and equal" might be too difficult a process. Abolition might be easier, he said.
The NDP, both provincially and nationally, has long advocated Senate abolition.
In a Saskatchewan Party news release, Wall said he believes his party's vote reflects the overall view of Saskatchewan people.
Wall is holding a news conference in Saskatoon Monday afternoon to discuss the referendum result.
The call to abolish comes at a time four senators — Mike Duffy, Mac Harb, Pamela Wallin and Patrick Brazeau — have come under official scrutiny over their traveling and living expenses.
Duffy has paid back $90,000, Harb has paid back $51,000, Wallin has paid back at least $38,000 and Brazeau has been ordered to pay back $48,000.