Nor Hachin (Nor Hachin, Armenian Նոր Հաճն) is a city in the Kotayk region of Armenia. Located on the right bank of the Hrazdan River, 9 km from the Abovyan railway station and 25 km north of Yerevan.

In 1973, a diamond processing workshop was opened in Nor-Achin, which later became one of the seven largest diamond processing plants (Kristall factory) operating in the USSR. Near the city is the Arzninskaya hydroelectric power station.