Tuyserkan County (Persian: شهرستان تویسرکان) is in Hamadan province, Iran.

[3] At the time of the 2006 National Census, the county's population was 109,262 in 28,917 households.

[5] The 2016 census measured the population of the county as 101,666 in 33,537 households.

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

Media related to Tuyserkan County at Wikimedia Commons Iran portal