Tebing Tinggi Deli or more commonly simply Tebing Tinggi is a chartered city (kota) near the eastern coast of North Sumatra, Indonesia. It has an area of 31 km² and a population at the 2010 National Census of 145,180. It is surrounded by Serdang Bedagai Regency, which has a kecamatan (district) bordering the city named Tebing Tinggi as well.