Sumida (墨田区, Sumida-ku) is a special ward in the Tokyo Metropolis in Japan.

Sumida's city office is located in Azumabashi, while its commercial center is the area around Kinshicho Station in the south.

The Sumida and Arakawa are the major rivers, and form parts of its boundaries.

Its neighbors are all special wards: Adachi to the north; Arakawa to the northwest; Katsushika to the east; Edogawa to the southeast; Taitō to the west; Chūō to the southwest; and Kōtō to the south.

Mukojima, formed in 1932, contained the former town of Sumida, which along with the river gave the ward its name.