The Lesser Caucasus or Lesser Caucasus Mountains, also called Caucasus Minor, is the second of the two main ranges of the Caucasus Mountains, of length about . The western portion of the Lesser Caucasus overlaps and converges with east Turkey and northwest Iran. It runs parallel to the Greater Caucasus, traversing through the Armenian highlands, at a distance averaging about south from the Likhi Range (Georgia), and limits east Turkey from the north and north-east. It is connected with the Pontic range and separated from it by the Kolkhida Lowland (Georgia) in the west and Kura-Aras Lowland (Azerbaijan) (by the Kura River) in the east.
The highest peak is Aragats in Armenia, .
The borders between Georgia, Turkey, Armenia, Azerbaijan and Iran run through the range, although its crest does not usually define the border. The range was historically called Anticaucasus or Anti-Caucasus (Greek: ÃÂýÃÂù-ÃÂñÃÂúñÃÂÿÃÂ, Russian: ÃÂýÃÂøúðòúðÃÂ÷, ÃÂýÃÂø-ÃÂðòúðÃÂ÷). This usage is commonly found in older sources. Current usage tends towards using the name Lesser Caucasus, but Anti-caucasus can still be found in modern texts.