Kalmati Pathar is a village in Sarupeta tehsil in district of Baksa, Assam, India. As per the data provided by Census of India in 2011, total population of Kalmati Pathar was 981 which includes 502 males and 479 females. Kalmati Pathar covers 259.89 ha area. Pincode of Kalmati Pathar is 781318.