The Sultanate of Rûm was the continuation of the Great Seljuq Empire in Anatolia, in direct lineage from 1077 to 1307, with capitals first at İznik and then at Konya. Since the court of the sultanate was highly mobile, cities like Kayseri and Sivas also functioned at times as capitals. At its height the sultanate stretched across central Anatolia from the Antalya-Alanya shoreline on the Mediterranean coast to the territory of Sinop on the Black Sea. In the east, the sultanate absorbed other Turkish states and reached Lake Van. Its westernmost limit was near Denizli and the gates of the Aegean basin.

The term Rûm comes from the Arabic word for the Roman Empire. The Seljuks called the lands of their sultanate Rum because it had been established on territory long considered Roman, i.e. Byzantine, by Muslim armies. The state is occasionally called the Sultanate of Konya (or Sultanate of Iconium) in older western sources.

The sultanate prospered, particularly during the late 12th and early 13th centuries when it took from the Byzantines key ports on the Mediterranean and Black Sea coasts. Within Anatolia the Seljuks fostered trade through a program of caravanserai-building, which facilitated the flow of goods from Iran and Central Asia to the ports. Especially strong trade ties with the Genoese formed during this period. The increased wealth allowed the sultanate to absorb other Turkish states that had been established in eastern Anatolia after the Battle of Manzikert: the Danishmends, the Mengücek, the Saltuklu, and the Artuklu. Seljuk sultans successfully bore the brunt of the Crusades but in 1243 succumbed to the advancing Mongols. The Seljuks became vassals of the Mongols, and despite the efforts of shrewd administrators to preserve the state's integrity, the power of the sultanate disintegrated during the second half of the 13th century and had disappeared completely by the first decade of the 14th.

In its final decades, the territory of the Seljuk Sultanate of Rûm saw the emergence of a number of small principalities or beyliks, among which that of the Osmanoğlu, known later as the Ottomans, rose to dominance.