Kentucky's 4th Senate district

Kentucky's 4th Senatorial district is one of 38 districts in the Kentucky Senate. Located in western Kentucky, it comprises the counties of Henderson, Hopkins, Union, and Webster. It has been represented by Robby Mills (R–Henderson) since 2019. As of 2022, the district had a population of 116,439.

Voter registration
On June 1, 2024, the district had 87,328 registered voters, who were registered with the following parties.