Mathiya Baj is a village in Poornagiri tehsil in district of Champawat, Uttarakhand, India. As per the data provided by Census of India in 2011, total population of Mathiya Baj was 517 which includes 246 males and 271 females. Mathiya Baj covers 742.23 ha area. Pincode of Mathiya Baj is 262523.