Sonasar (Armenian: Սոնասար) is a village in the Lachin District of Azerbaijan.

There was an ancient Armenian church in the village, which was used by the village's Kurdish population in the late 19th century as a shed, and has been left completely ruined in the present-day.

[2]: 155–157 The village was located in the Armenian-occupied territories surrounding Nagorno-Karabakh, coming under the control of ethnic Armenian forces during the First Nagorno-Karabakh War in the early 1990s.

It was returned to Azerbaijan as part of the 2020 Nagorno-Karabakh ceasefire agreement.

Historical heritage sites in and around the village include a grave field from the 2nd century BCE, a khachkar on a pedestal from 1056, an 11th-century khachkar, a bridge from between the 11th and 13th centuries, a cemetery from between the 12th and 18th centuries, a 14th-century khachkar, two 14th-century tombstones, a 17th-century inscription, and a 17th-century chapiter.