Steven Jeffrey Seddon (born 25 December 1997) is an English footballer who plays as a left back for EFL League One club Oxford United. Seddon was on the books of Reading as a youngster before joining Birmingham City in 2014 when he left school. He spent the first half of the 2018–19 season on loan to League Two club Stevenage, for whom he made his Football League debut, and the second half on loan to AFC Wimbledon of League One. In 2019–20 he was loaned to Portsmouth and he spent the first half of the 2020–21 season back with AFC Wimbledon. He made 12 appearances for Birmingham before leaving for Oxford United in 2021.