Hoseynabad-e Korus () is a village in Eyvanki Rural District of Eyvanki District in Garmsar County, Semnan province, Iran.
At the time of the 2006 National Census, the village's population, as Hoseynabad-e Koru, was 107 in 27 households. The following census in 2011 counted 147 people in 46 households, by which time the village was listed as Hoseynabad-e Korus. The 2016 census measured the population of the village as 190 people in 69 households.