William Ferry (born 7 December 2000) is a professional footballer who plays as a full-back for Scottish Premiership club Dundee United. Born in England, he is a youth international for Ireland.

Born in Bury, Ferry spent his early career with Bury and Southampton, turning professional in 2017. He signed a new two-year contract with Southampton in August 2021 and immediately moved on loan to Crawley Town.

In August 2022 he signed for Cheltenham Town on a two-year contract. Following relegation at the end of the 2023–24 season, Ferry was offered a new contract to remain with the club.

On 6 June 2024, Ferry agreed to join Scottish Premiership club Dundee United on a three-year deal from the expiration of his contract with Cheltenham Town. He scored his first professional goal for United on 22 March 2026 in a 2–0 win against Celtic.

Ferry is a former Republic of Ireland under-18, under-19 and under-21 international. On 6 October 2025, he received his first senior Republic of Ireland call-up, replacing the injured Callum O'Dowda in the squad for the 2026 FIFA World Cup qualifiers against Portugal and Armenia.