Charles Walder Grinstead (1 December 1860 – 16 March 1930) was an English champion tennis player.

Grinstead reached the Wimbledon All Comers Final in 1884, where he beat Ernest Renshaw before losing to Herbert Lawford.

In 1884, the Oxford Men's Doubles event and its trophy were handed over to the All England Club to be known as the All England Men's Doubles as part of the Wimbledon Championships; consequently winners of the Oxford events are included as Wimbledon champions.

Instead in the spring of 1885, he immigrated to Ontario, Canada where he spent nine months, and then relocated to the United States of America.

[6] Charles Walder Grinstead died in Nikenbah, Hervey Bay, Queensland, Australia on 16 March 1930.