Voters will select a successor to the late Sen. Alice Harden on Feb. 5.
If no candidate wins a majority, a runoff will be held Feb. 26.
Gov. Phil Bryant set the election dates Tuesday. Candidates, who will run without party labels, must qualify by Jan. 7. Senate District 28 covers parts of Hinds County.
Longtime Democratic Mississippi state Sen. Bennie Turner, a lawyer, champion of public education and respected member of the Legislature, died Tuesday. He was 64.
Sen. Hob Bryan, a longtime colleague and friend of the legislator, told The Associated Press that Turner died Tuesday, Nov. 27, at the University of Mississippi Medical Center in Jackson, where he had been hospitalized with an illness.