William Percy

• William de Percy, Anglo-Norman nobleman, crusader and founder of Whitby Abbey
• William Percy, MP for Sussex
• William Percy , British bishop
• William Percy , English poet and playwright
• William Percy , of Manchester, England
• William Henry Percy, British naval officer
• William Alexander Percy, American politician and grandfather of the below
• William Alexander Percy, American lawyer, planter and poet
• William Armstrong Percy III, American historian and gay activist