Aliabad-e Posht-e Rig (, also Romanized as ‘Alīābād-e Posht-e Rīg and ‘Alīābād-e Posht Rīg; also known as ‘Alīābād and ‘Alīābād Yasht Rīg) is a village in, and the capital of, Posht-e Rig Rural District of the Central District of Rigan County, Kerman province, Iran.
At the 2006 National Census, its population was 765 in 201 households, when it was in Rigan Rural District of the former Rigan District of Bam County. The following census in 2011 counted 1,114 people in 296 households, by which time the rural district had become a part of the Central District of the newly established Rigan County. The latest census in 2016 showed a population of 1,379 people in 359 households.
In 2023, Posht-e Rig Rural District was established in the Central District, and Sadabad Rural District was established in the newly formed Rahmatabad District.