Kathryn Barger is an American politician, serving as a member of the Los Angeles County Board of Supervisors for the 5th District since 2016 and is the Chair of Los Angeles County. A member of the Republican Party, Barger served as Chair of Los Angeles County from 2019–2020 and 2024–present. She previously served as Chief Deputy Supervisor and Chief of Staff to her predecessor Mayor Michael D. Antonovich.