Tarom County (Persian: شهرستان طارم) is in Zanjan province, Iran.

[4] Ibn Muhalhal visited here c. 943 and wrote that it was one of the main strongholds of the Daylamite kings and had about 2,850 houses.

[4] Al-Muqaddasi wrote about the same time that the fortress of Semiran had "lions of gold, and the sun and the moon" on its walls; the town's houses were built from mud brick.

[4] Its fortress, he wrote, was garrisoned by a thousand men and had an underground conduit to supply water.

[4] The 14th-century author Hamdallah Mustawfi gave a detailed description of the two Taroms in his Nuzhat al-Qulub.

[5] He described the two regions as fertile for agriculture – they supplied the city of Soltaniyeh with most of its fruit, he wrote – and populated mostly by Sunnis of the Shafi'i madhhab.

[5] He said this district included about 100 villages; the most important were Jazlā, Shūrzad, Darām, Ḥayāt, Qalāt, Razīd, and Shīd.

[2] Tarom County's population history and administrative structure over three consecutive censuses are shown in the following table.

Tarom is part of the Tarom-Hashtjin Metallogenic Province, which is one of the most important epithermal regions in Iran.

[11]: 271  Tarom also has relatively more alunite deposits than Hashtjin, including ones at Yuzbash Chay, Kamar Rud, Nasr Abad, Sirdan, Zajkan, and Zajkandi.