Lori Fortress (Armenian: Լոռի բերդ) is an 11th-century Armenian fortress located near the Lori Berd village in Lori Province, Armenia. The fortress was built by David Anhoghin to become the capital of Kingdom of Tashir-Dzoraget in 1065.

The Lori Fortress was the site where the Georgian king Giorgi III of Georgia trapped and besieged his rebellious nephew, Demna of Georgia in 1177.

The fortress was captured by the Mongol commander Chagatai the Elder in 1239.