Iowa's 1st Senate district

Iowa's 1st
State Senate district

Senator
  Catelin Drey
DSioux City

The 1st district of the Iowa Senate, located in Northwestern Iowa, is currently composed of part of Woodbury County. It is represented by Catelin Drey, who won an August 2025 special election to succeed Republican Rocky De Witt. On September 15, 2025, she was sworn in by Iowa Supreme Court Justice Matthew McDermott.