William Barclay

• William Barclay , Scottish jurist
• William Barclay , Scottish writer
• William Barclay , English miniature painter
• William Barclay , Northern Irish Senator
• William Barclay , theologian and writer of Bible commentaries
• William A. Barclay, New York State Assemblyman
• William Edward Barclay, football manager of Everton and of Liverpool
• Bill Barclay, American athlete and coach