The 2020 San Diego County Board of Supervisors election was held on Tuesday, November 3, 2020, with the primary election held on March 3, 2020. While the San Diego County Board of Supervisors is officially a nonpartisan institution, Republicans controlled four out of the five supervisory seats, while a Democrat held one. However, the election resulted in a Democratic majority for the first time in decades after Nora Vargas and Terra Lawson-Remer respectively won supervisorial elections in the first and third districts.
