Martin James Guptill (born 30 September 1986 in Auckland) is a New Zealand cricketer. He is a top-order batsman and has represented New Zealand in different age groups.

Guptill attended Avondale College and played in the school's 1st XI cricket team. He was also a prefect in his final year.

At the age 14,Guptill was involved in a crown forklift truck accident and lost three toes.This fact was revealed to the world by provincial teammate Scott Styris whilst Styris was commentating on Guptill's ODI debut. This has since earned Guptill the nickname "Two Toes" within the Black Caps team. When Guptill was in the hospital, his father asked Jeff Crowe if a New Zealand player could visit him. Stephen Fleming, the then New Zealand captain, visited him at the hospital the next day.