Esfezar (Persian: اسفزار) is a village in Mud Rural District of Mud District, Sarbisheh County, South Khorasan province, Iran.

In 1383, Timur the conqueror captured Esfezar after it had revolted. Because it had interrupted his heavily planned invasion of Georgia, he ordered that all survivors of the Siege be cemented into the walls of the city. Though it is likely that their bodies were later removed by Timur himself. This could also be a myth, to try and demonize Timur.

At the time of the 2006 National Census, the village's population was 460 in 131 households. The following census in 2011 counted 388 people in 114 households. The 2016 census measured the population of the village as 394 people in 132 households. It was the most populous village in its rural district.

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