Oja-Beyt also known as جاءبِيت is a town in Chalus County, Iran. It is located at latitude 36° 29' 28 N and longitude 51° 08' 36 E. It lies at an altitude of 1372 metres in the Alborz mountains, 50 km to the north of Tehran, and 25 km south of the Caspian Sea.