Khoshab County () is in Razavi Khorasan province, Iran. Its capital is the city of Soltanabad.
The National Census in 2011 counted 37,914 people in 10,989 households. At the 2016 census, the county's population was 37,181 in 11,883 households.
Administrative divisions
The population history and structural changes of Khoshab County's administrative divisions over two consecutive censuses are shown in the following table. The latest census shows two districts, five rural districts, and one city.
After the 2016 census, Now Deh-e Anqolab District was established, with the newly formed Now Deh-e Anqolab Rural District and Tabas Rural District as its subdivisions. The district's capital, Now Deh-e Arbab, was elevated from village status to that of a city, as was the village of Meshkan in Meshkan District.