Guinea Grass is a town in the Orange Walk District of the nation of Belize. Guinea Grass is located at Latitude 17.9500, Longitude -88.5833, at an altitude of 38 meters (127 feet) above sea level. It is on a spur road about 6 miles off Belize's northern highway, and is served by regular bus route from Orange Walk Town.

According to the 2000 census, Guinea Grass Town had a population of 2,510 people. The town has a community of immigrants from Taiwan.