John Alderson

• John Alderson (physician), English physician
• John D. Alderson, United States Representative from West Virginia
• Jack Alderson, English footballer
• John Alderson (footballer), English footballer
• John Alderson (actor), English-born Hollywood actor
• John Alderson (police officer), British police officer, Chief Constable of Devon and Cornwall, 1973–1982
• John Alderson (cricketer), New Zealand cricketer