is an administrative and postal area of Chiyoda, Tokyo, Japan. It was formerly Kanda-ku.

Many establishments are located in Hitotsubashi. In Hitotsubashi 1-chome are the headquarters of the Mainichi Shimbun. In 2-chome are Hitotsubashi University Chiyoda Campus, Josuikaikan Hall, alumni hall of Hitotsubashi University, Kyoritsu Women's University,