Sumida (墨田区, Sumida-ku) is a special ward located in Tokyo Metropolis, Japan. The English translation of its Japanese self-designation is Sumida City. As of 1 May 2015, the ward has an estimated population of 257,300 and a population density of 18,690 persons per km2. The total area is 13.77 km2. Its City Office is located in Azumabashi, but its commercial centre is around Kinshicho Station in the south.