Grant Webb (born 11 August 1979 in Palmerston North, New Zealand is a New Zealand rugby union player. He plays his rugby as a .
On the 20th December 2007 Grant Webb arrived in Belfast on a season long contract with Magners League outfit Ulster Rugby, following a season playing in New Zealand's NPC tournament, with Hawkes Bay.
As of May 2008, his future would appear to be with Welsh regional side the Newport Gwent Dragons.
Previously Webb had been in Japan with the Toyota Verblitz club in Japan's Top League, having left Otago in 2005, during which he faced the British and Irish Lions