Tilaia Bahiar is a village in Pirtanr tehsil in district of Giridih, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Tilaia Bahiar was 651 which includes 322 males and 329 females. Tilaia Bahiar covers 208.6 ha area. Pincode of Tilaia Bahiar is 825108.