The North Caucasus (or Ciscaucasia; Russian: Северный Кавказ) is the northern part of the Caucasus region between the Black and Caspian Seas and within European Russia. The term is also used as a synonym for the North Caucasus economic region of Russia.

Politically, the Northern Caucasus (territory north of the Greater Caucasus Range) includes the Russian Republics of the North Caucasus. As part of the Russian Federation, the Northern Caucasus region is included in the North Caucasian and Southern Federal Districts and consists of Krasnodar Krai, Stavropol Krai, and the constituent republics, approximately from west to east: Republic of Adygea, Karachay–Cherkessia, Kabardino-Balkaria, North Ossetia–Alania, Ingushetia, Chechnya, and Republic of Dagestan. Since October 2007, separatists and Caucasus Front soldiers led by Dokka Umarov and Akhmed Yevloyev have claimed all of the North Caucasian regions from Karachay–Cherkessia to the Caspian Sea as part of their territory invaded by Russia during the 18th century that have expulsed most of the Caucasians towards Turkey, Bulgaria, Syria, and Jordan. This proclaimed Caucasus Emirate has been met with opposition within the Caucasus region from the Chechen Republic of Ichkeria.^{[citation needed]}

The Caucasus, also Caucas or Caucasia (for endonyms, see below), is a geopolitical region at the border of Europe and Asia, and situated between the Black and the Caspian sea. It is home to the Caucasus Mountains, which contain Europe's highest mountain, Mt. Elbrus. Politically, the Caucasus region is separated between northern and southern parts.

The northern portion of the Caucasus is known as the Ciscaucasus and the southern portion as the Transcaucasus.

The Ciscaucasus contains the larger majority of the Greater Caucasus Mountain range, also known as the Major Caucasus mountains. It includes Southwestern Russia and northern parts of Georgia and Azerbaijan.

The Transcaucasus is bordered on the north by Russia, on the west by the Black Sea and Turkey, on the east by the Caspian Sea, and on the south by Iran. It includes the Caucasus Mountains and surrounding lowlands. All of Armenia, Azerbaijan (excluding the northern parts) and Georgia (excluding the northern parts) are in South Caucasus.