Garhkasmar is a village in Peshrar tehsil in district of Lohardaga, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Garhkasmar was 689 which includes 348 males and 341 females. Garhkasmar covers 326 ha area. Pincode of Garhkasmar is 835302.