Edo may refer to:

• Edo, the historical name for Tokyo, Japan
• Edo Aircraft Corporation, a defunct American company that primarily designed aircraft floats
• Edo language, a language spoken in Nigeria
• Edo period, in Japanese history
• Edo River, a river in Japan
• Edo State, a province in Nigeria
• Edo people, the inhabitants of the province, creators of the Benin Empire
• Ejaculatory duct obstruction
• A race in Star Trek

, also romanized as Yedo or Yeddo, is the former name of the Japanese capital Tokyo. It was seat of power for the Tokugawa shogunate, which ruled Japan from 1603 to 1868. During this period it grew to become one of the largest cities in the world and home to an urban culture centered on the notion of a "floating world".