At the state level, Scott County lies within parts of three separate legislative districts for the Missouri House of Representatives. Most of the county is part of the 148th District, which also includes a portion of Mississippi County. It is currently represented by Holly Rehder (R-Sikeston), who was re-elected in November 2018 without opposition.
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Part of the Sikeston area falls within the 149th District, which also includes all of New Madrid and parts of Mississippi and Pemiscot Counties. It is currently represented by Don Rone (R-Portageville), who was re-elected in November 2018, defeating Democrat Bill Burlison.
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Rone narrowly lost to Burlison within the Scott County portion, but won the district overall.
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The western parts of the county, including the Chaffee and Oran areas, are in the 151st District, which also includes all of Stoddard County. It is currently represented by Herman Morse (R-[[Dexter, Missouri|Dexter]], who was re-elected in November 2018, defeating Democrat Jerry Howard.