Qeydar (Persian: قيدار)[a] is a city in the Central District of Khodabandeh County, Zanjan province, Iran, serving as capital of both the county and the district.

[4][5] The city is named after the biblical figure Qedar, who was the progenitor of the Qedarite tribal confederation of North Arabia and the son of Ishmael.

The Shi'ite sect of Islam (which is predominant in Iran) believes that Qedar was a prophet.

[6] Other names for the city stemming from the same source include Geydār, Geydār Palnamnār, Ghaidar, Ghaidar Paighambar, Kedar, Keydar, Keydar-Peygambar, and Qidār Peyghāmbar.

[13] The 2016 census measured the population of the city as 34,921 people in 10,028 households.