Torbat-e Jam County () is in Razavi Khorasan province, Iran. Its capital is the city of Torbat-e Jam.
The village of Ahmadabad-e Sowlat was converted to a city in 2007, and likewise the village of Samiabad-e Arbab Din Mohammad in 2017. Salehabad District was separated from the county in the establishment of Salehabad County the following year.
At the time of the 2006 National Census, the county's population was 239,395, in 53,510 households. The following census in 2011 counted 262,712 people in 65,817 households. The 2016 census measured the population of the county as 267,671 in 71,802 households.
Torbat-e Jam County's population history and administrative structure over three consecutive censuses are shown in the following table.