Guzgan (Persian: گوزگان, also known as Gozgan, Guzganan or Quzghan) was a historical region and early medieval principality in what is now northern Afghanistan.

The 19th-century scholar Henry George Raverty suggested that the plural form emerged from the division of the country in two parts by the river Murghab.

As attested by legal documents that have tentatively been dated to the late 7th and early 8th century, the area was controlled by a local family that used the country Gozgan as the dynastic name, a custom of the era.

But during the rule of the Rashidun caliph Ali (656–661), the Arabs were expulsed from eastern Iran, as far as Nishapur and the Sasanian Peroz III was able to establish some level of control with the help of the yabghu of Tokharistan in Seistan.

[2] Despite the Arab conquest, a native dynasty, the Farighunids, who claimed descent from the Persian mythological hero Faridun and bore the title of Guzgan-Khudha, continued to rule from their capital, Kundurm.