The 2020 St. Louis County Executive special election took place on November 3, 2020. On April 29, 2019, County Executive Steve Stenger resigned following a federal indictment for bribery and fraud. The County Council elected Council Chairman Sam Page to serve as County Executive until the 2020 special election.
Page ran to serve out the remainder of Stenger's term. He faced a competitive Democratic primary, with challenges from 2018 candidate Mark Mantovani and County Assessor Jake Zimmerman, and won the primary with a 38 percent plurality. In the general election, he was challenged by Paul Berry III, the Republican nominee, who previously ran for the office in 2018. Page won re-election in a landslide, receiving 58 percent of the vote to Berry's 36 percent.