Släthult is a village in Gislaved Municipality, in Jönköping County, Sweden. Släthult lies at 184 m above sea level. The nearest city is Värnamo, 40 km to the east. Among the landmarks around are Burseryds kyrka (6.0 km), Södra Hestra Church (12.2 km) and Villstad Church (3.9 km).