Hasar was a village in the territory of the Echmiadzin uezd of the former Iravan governorate, later in the former Gurdugulu (Hoktemberyan) district, and present-day Armavir province. It was located 36 km to the west of the settlement of Gurdugulu and on the left bank of the Araz River. The name of the village was marked as “Assar” on the five-verst map of the Caucasus.

The village was solely inhabited by Azerbaijanis: 92 in 1831, 110 in 1873, 114 in 1886, 130 in 1897, 113 in 1908, 134 in 1914 and 76 Azerbaijanis in 1916. The Azerbaijanis were attacked, massacred or ousted from the village by Armenian armed units in 1918. After the establihsment of Soviet power in present- day Armenia, the Azerbaijanis who survived managed to return to the village. The village was inhabited by 32 Azerbaijanis in 1922 and 49 in 1926. The Azerbaijanis were dispersed from their historical and ethnic lands in 1928–1929 and the village was abolished in 1930. At present, it lies in ruins.

The toponym was coined on the basis of the word “hisar/hasar” meaning “a walled, fortified town or fort on a lowland” in Turkic.