Grindstone (disambiguation)


 * Grindstone is a tool used for sharpening

Grindstone may also refer to: Places:
 * A type of millstone used to grind grains such as wheat
 * Grindstone (horse), 1996 Kentucky Derby winner and sire of the racehorse Birdstone
 * Grindstone (album), 2007 album by the Norwegian band Shining
 * Grindstone (time tracking software), a program that allows users to create and organize tasks and to track time
 * Grindstone 100 Miler, a 100 mi ultramarathon in Virginia
 * Grindstone (video game), a 2019 video game by Capybara Games
 * Grindstone, Pennsylvania
 * Grindstone, South Dakota
 * Grindstone, Manitoba, a peninsula and part of the Hecla-Grindstone Provincial Park in Manitoba, Canada.
 * Grindstone Butte, a summit in South Dakota
 * Grindstone City Historic District in Port Austin Township, Michigan
 * Grindstone Island (Magdalen Islands), an island in the Magdalen Islands, Quebec, Canada
 * Grindstone Island (Ontario), is an island in Big Rideau Lake, Ontario, Canada.
 * Grindstone Island, is one of the Thousand Islands, in the St. Lawrence River in the United States of America.