Sarajlu (Persian: ساراجلو, also Romanized as Sārājlū) is a village in Iran. It is located within the administrative boundaries of Kaleybar County, in the East Azerbaijan Province.
Geographically, Sarajlu is situated in the Central District (بخش مرکزی) of Kaleybar County, specifically within the Rural District of Peyghan Chayi (دهستان پیغانچای). Kaleybar County itself is one of the counties of East Azerbaijan Province, which is one of the 31 provinces of Iran.
According to the 2016 Iranian census, the village of Sarajlu had a population of 17 inhabitants, distributed among 5 families. The region surrounding Kaleybar County is often recognized for its mountainous landscape and forms part of the Arasbaran region, an important ecological area and UNESCO-registered biosphere reserve. The local economy in such villages is typically based on agriculture and animal husbandry.