Ōta is a special ward located in Tokyo Metropolis, Japan. In English, it is often called Ōta City.
As of June 1, 2016, the ward has an estimated population of 716,413, with 379,199 households and a population density of 12,048.65 persons per km². The total area is 59.46 km², the largest of the special wards.
Ōta's hub is situated around the two stations Kamata and Keikyū Kamata, where the Ōta Ward Office and central Post Office can be found.