| William Barclay | |
| Full Name: | William Edward Barclay |
| Birth Date: | 14 June 1857 |
| Birth Place: | Dublin, Ireland |
| Death Place: | Liverpool, England |
| Manageryears1: | 1888–1889 |
| Manageryears2: | 1892–1896 |
| Managerclubs1: | Everton |
| Managerclubs2: | Liverpool |
William Edward Barclay (14 June 1857 – 30 January 1917[1]) was the first manager of Everton, and also the first manager of Liverpool working with club secretary John McKenna.
His time at Everton was short managing the team for their first 22 games. When the majority of the Everton club left Anfield moving to the purpose-built Goodison Park, Barclay was one of the people who stayed at Anfield to form a new club which eventually became Liverpool F.C.
While he was in charge of the side that won the Second Division championship in 1893–94, Liverpool got relegated from the First Division the following season (with Liverpool losing a test match to Bury 1–0). However, in his last season as Liverpool manager, Barclay led the side to the Second Division championship in 1895–96.
Barclay also served two spells as Liverpool chairman and worked for the Football Association.
Barclay remained the only person to have managed both Liverpool and Everton until the appointment of Rafael Benítez as Everton manager in 2021.