Coordinates: 40°27′34″N 44°38′55″E / 40.45944°N 44.64861°E / 40.45944; 44.64861

Bjni (Armenian: Բջնի; also written Bjini or Bzhni) is a village in the Kotayk Province of Armenia. It is situated in a valley between canyon walls and a small river. Throughout Bjni's history, it has remained one of the main centers of education in Armenia. Some manuscripts from Bjni dated to the 12th to 17th centuries have survived. The first recorded mention of the village was by the 5th to 6th century chronicler and historian Ghazar Parpetsi.

In the 11th century, the lands of Bjni were passed to the Pahlavuni family and played a significant role in Armenian life during the Bagratuni Dynasty. Around this time, King Hovhannes-Smbat made the decision that the lands should become an Episcopal settlement. In 1066, the election for the Patriarch took place in Bjni. At the beginning of the 13th century, the lands were passed on to the Zakharyan family. A century later in the years 1387-1388 the Turko-Mongol conqueror Timur Lenk destroyed the village of Bjni. The French traveler Jean Chardin visited the village in 1673, and in 1770 it was visited by the traveler Turenfor.