Hesar-e Qajar (Persian: حصارقاجار, also Romanized as Ḩeşār-e Qājār and Ḩeşār Qājār; also known as Kadzhar and Qājar)[1] is a village in Howmeh Rural District, in the Central District of Abhar County, Zanjan Province, Iran. At the 2006 census, its population was 330, in 94 families.[2]