Hoseynabad-e Dulab () is a village in Damankuh Rural District of the Central District in Damghan County, Semnan province, Iran.
At the time of the 2006 National Census, the village's population, as Hoseynabad-e Dula, was 338 in 113 households. The following census in 2011 counted 289 people in 98 households, by which time the village was listed as Hoseynabad-e Dulab. The 2016 census measured the population of the village as 259 people in 102 households.