Bunkyō (文京区, Bunkyō-ku) is a special ward in the Tokyo Metropolis in Japan. Situated in the middle of the ward area, Bunkyō is a residential and educational center. Beginning in the Meiji period, literati like Natsume Sōseki, as well as scholars and politicians have lived there. Bunkyō is home to the Tokyo Dome, Judo's Kōdōkan, and the University of Tokyo's Hongo Campus.

It was formed in 1947 as a merger of Hongo and Koishikawa wards following Tokyo City's transformation into Tokyo Metropolis. The modern Bunkyo ward exhibits contrasting Shitamachi and Yamanote geographical and cultural division. The Nezu [ja] and Sendagi [ja] neighborhoods in the ward's eastern corner are attached to the Shitamachi area in Ueno. On the other hand, the remaining areas of the ward typically represent Yamanote districts.

As of 2022, the ward has a population of 240,069 (including about 8,500 foreign residents), and a population density of 21,263 inhabitants per square kilometre (55,070/sq mi). The total area is 11.29 square kilometres (4.36 sq mi).

Bunkyo was formed in 1947 as a merger of Hongo and Koishikawa wards following Tokyo City's transformation into Tokyo Metropolis.

There are approximately twenty districts in the area and these are as follows:

Bunkyo is governed by Mayor Hironobu Narisawa, an independent supported by the Liberal Democratic Party, Democratic Party of Japan and Komeito.^{[needs update?]} The city council has 34 elected members.

The publishing company Kodansha has its headquarters in the ward, and Kodansha International has its headquarters in the Otowa YK Building in the ward. The drugstore chain Tomod's has its headquarters in the ward. Penta-Ocean, the construction firm specializing in marine works and land reclamation also has its headquarters in Bunkyo. The automobile manufacturer Toyota has its Tokyo headquarters in the ward.

By 2025, increasing numbers of Chinese immigrant families, of wealthy backgrounds, were moving to the ward to enroll their children in local elementary schools.