Asu (Persian: اسو, also romanized as Āsū and Asow’; also known as Asa)[1] is a village in Alqurat Rural District, in the Central District of Birjand County, South Khorasan Province, Iran.

At the 2006 census, its population was 791, in 184 families.

[2] This Birjand County location article is a stub.

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