Grindal is a surname. Notable people with the surname include:
Alan Grindal (born 1940), Australian former Olympic cyclist Edmund Grindal (c. 1519–1583), Bishop of London, Archbishop of York, and Archbishop of Canterbury James Grindal (born 1980), English former rugby union footballer
See also Grindal Island, South Australia Enchytraeus buchholzi, also known as Grindal worms