Alleyn is a surname, and may refer to:

• Charles Joseph Alleyn (1817-1890), Quebec lawyer and political figure
• Edward Alleyn (1566-1626), English actor
• James Alleyn (1683-1746), English educationalist
• John Alleyn (died 1686), fifth Master of the College of God's Gift in Dulwich
• Matthias Alleyn (died 1642), second Master of the College of God's Gift in Dulwich
• Raph Alleyn (died circa 1677), fourth Master of the College of God's Gift in Dulwich
• Roderick Alleyn, a fictional police detective
• Thomas Alleyn (3rd Master of Dulwich College) (died circa 1668), third Master of the College of God's Gift in Dulwich
• Thomas Alleyn (Barber-Surgeon) (died 1631), first Master of the College of God's Gift in Dulwich

See also

• Allen
• Allyn (disambiguation)