Newcastle is the third-largest city in the province of KwaZulu-Natal, South Africa and is the province's industrial centre. The city has four industrial areas. The majority of its citizens reside in Newcastle East in the main townships of Madadeni and Osizweni, with the balance residing in Newcastle West. Set at the foothills of the northern KwaZulu-Natal Drakensberg Mountains, Newcastle is located in the northwest corner of the province along the Ncandu River.