Republican incumbent state representative Sue Allen, a Town and Country resident, took a win in the new District 100 that includes Chesterfield.
Allen, a physical therapist and Iowa native, was first elected in November 2008 in District 92, and re-elected in 2010.
New district borders came about after the 2010 U.S. Census showed a drop in population out of the St. Louis area, and residents moved west.
Allen took 100 percent of the votes for the district in the primary election Tuesday, totaling 4,813 ballots cast. She had no opponent.
As of Wednesday morning, August 8, all 31 precincts were tallied.
Election results are considered unofficial until the Missouri Secretary of States deems them otherwise.