William Lithgow

• William Lithgow (traveller and author), Scottish traveller and author
• William Lithgow (judge), judge for the Court of Common Pleas of Massachusetts
• William Lithgow (auditor-general), Scottish clergyman, first Auditor General of New South Wales
• William Lithgow (shipbuilder), Scottish shipbuilder
• William Lithgow (cricketer), English cricketer and British Army officer
• Sir William Lithgow, 2nd Baronet, Scottish industrialist from shipbuilding family