As of November 1, 2010, the city has an estimated population of 176,737. and a population density of 10,711.33 persons per km². The total area is 16.50 km² and is about 50 – 55 meters above sea level. Mitaka City was officially founded on November 3, 1950.
As of 1994 there were 2,585 foreign residents in Mitaka, including 726 from North and South Korea, 713 from China, 441 from the United States, 114 from the Philippines, and 108 from the United Kingdom. Of all municipalities in Japan, Mitaka had the highest proportion of Chinese returnees.
Mitaka is located on the Kantō Plain, just outside the 23 special wards of metropolitan Tokyo, which are on its eastern borders. It is bordered by the cities of Musashino to the north, Chōfu to the south, and Koganei to the west.