Os is a village in Värnamo Municipality, in Jönköping County, Sweden. Os lies at 199 m above sea level. It has 58 inhabitants. The nearest city is Värnamo, 17.8 km to the west. Among the landmarks around are Nydala Abbey (13.7 km), Hjälmseryd old Church (16.2 km) and Vrigstad Church (19.2 km).