Kolaisai is a village in Jagannathpur tehsil in district of Pashchimi Singhbhum, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Kolaisai was 518 which includes 250 males and 268 females. Kolaisai covers 265 ha area. Pincode of Kolaisai is 833203.