Newcastle is the third-largest city in KwaZulu-Natal, South Africa, with a total population of 363,236 citizens as of the 2011 census. 56,144 of these citizens reside in Newcastle West, whilst the balance of the population reside in the townships of Madadeni and Osizweni, which form Newcastle East. Newcastle is located in the north west corner of the province along the Ncandu River and is one of the country's main industrial centers, encompassing four industrial zones.