The term Whetstone can refer to:

• Whetstone, a sharpening stone used for knives and other cutting tools
• Whetstone (benchmark), a benchmark for measuring computing power
• Operation Whetstone, a nuclear test program in the 1960s

Places

United Kingdom

• Whetstone, Cumbria
• Whetstone, Leicestershire, a village and civil parish
• Whetstone, London
• Whetstones (stone circle), an ancient pagan monument in Shropshire

United States

• Whetstone, Arizona, a census-designated place
• Whetstone, West Virginia, an unincorporated community
• The Whetstone River in South Dakota and Minnesota

Surname

• George Whetstone
• Peter Whetstone
• Rachel Whetstone
• W. E. Whetstone
• William Whetstone