The epithet "the Grim" may refer to:

• Archibald Campbell, 7th Earl of Argyll (c. 1575–1638), also called "Gillesbuig Grumach" ("Archibald the Grim"), Scottish politician and military leader
• Archibald Douglas, 3rd Earl of Douglas (1328–1400), Scottish magnate
• Selim I (1465/1466/1470–1520), Sultan of the Ottoman Empire
• Hogun, a Marvel Comics character