Seyyed Ayaz (Persian: سيداياز)[a] is a village in Fathabad Rural District of the Central District of Qasr-e Shirin County, Kermanshah province, Iran.

At the time of the 2006 National Census, the village's population was 412 in 112 households, when it was in Nasrabad Rural District.

[4] The following census in 2011 counted 413 people in 118 households, by which time the village had been transferred to Fathabad Rural District.

[5] The 2016 census measured the population of the village as 406 people in 130 households.

This Qasr-e Shirin County location article is a stub.