Kizlyar is a town in the Republic of Dagestan, Russia, located on the border with the Chechen Republic in the delta of the Terek River 221 kilometers (137 mi) northwest of Makhachkala, the capital of the republic. As of the 2010 Census, its population was 48,984.

Dagestan, officially the Republic of Dagestan, is a republic of Russia situated in the North Caucasus of Eastern Europe, along the Caspian Sea. It is located north of the Greater Caucasus, and is a part of the North Caucasian Federal District. The republic is the southernmost tip of Russia, sharing land borders with the countries of Azerbaijan and Georgia to the south and southwest, the Russian republics of Chechnya and Kalmykia to the west and north, and with Stavropol Krai to the northwest. Makhachkala is the republic's capital and largest city; other major cities are Derbent, Kizlyar, Izberbash, Kaspiysk, and Buynaksk.