Abhar County () is in Zanjan province, Iran. Its capital is the city of Abhar.
In 2013, Soltaniyeh District was separated from the county in the establishment of Soltaniyeh County.
At the time of the 2006 National Census, Abhar County's population was 158,544 in 41,333 households. The following census in 2011 counted 169,176 people in 49,478 households. The 2016 census measured the population of the county as 151,528 in 47,329 households.
Abhar County's population history and administrative structure over three consecutive censuses are shown in the following table.