Johniya Mafi is a village in Garhi tehsil in district of Banswara, Rajasthan, India. As per the data provided by Census of India in 2011, total population of Johniya Mafi was 417 which includes 199 males and 218 females. Johniya Mafi covers 172.83 ha area. Pincode of Johniya Mafi is 327022.