William Mair

• William Mair (South [Australian politician)], member of the South Australian House of Assembly
• Bill Mair, Australian politician, member of the Victorian Legislative Council
• William Mair (chemist), Scottish pharmacist and manufacturing chemist
• William Mair (moderator), Scottish minister
• William Crosbie Mair, Scottish physician
• William Gilbert Mair, soldier, resident magistrate, and judge in New Zealand