Edo or EDO may refer to:

• Edo language, a language spoken in Nigeria
• Edo period, in Japanese history
• Edo people, the inhabitants of the province, creators of the Benin Empire
• Edo-Khel, a Pashtun tribe of southeastern Afghanistan
• A Star Trek race, see "Justice" (Star Trek: The Next Generation)

, also romanized as Yedo or Yeddo, is the former name of Tokyo. It was the 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".