Malcolm Sinclair is a name that may refer to

• Malcolm Sinclair (Swedish nobleman) (1690–1739) whose assassination caused the Russo–Swedish War of 1741–1743
• Malcolm Sinclair (politician) (b. 1948), British politician and member of the House of Lords
• Malcolm Sinclair (actor) (b. 1950), English stage and television actor and president of Equity trade union

• Recurrent nova
• Recurrent oral aphthae
• Recurrent palmar peeling
• Recurrent palmoplantar hidradenitis
• Recurrent perineal erythema
• Recurrent (RAS) aphthous stomatitis
• Recurrent respiratory papillomatosis
• Recurrent sequence
• Recurrent tensor
• Recurrent Tensor
• Recurrent thalamo-cortical resonance
• Recurrent toxin-mediated perineal erythema
• Recurrent traumatic brain injury
• Recurring and minor characters in 24
• Recurring characters in Asterix
• Recurring characters in Last of the Summer Wine
• Recurring characters in the Albert Campion series
• Recurring characters in the Aubrey-Maturin series
• Recurring characters in The Brittas Empire
• Recurring characters in the Front Mission series
• Recurring characters in The Legend of Zelda series
• Recurring characters in the Mario series
• Recurring characters in VeggieTales
• Recurring characters on the simpsons
• Recurring cheers characters