Higashi-ku (東区) is one of four wards of Okayama, Okayama Prefecture, Japan. The ward has an area of 160.28 km and a population of 96,718. The population density is 603 per km. The name means "East Ward."

The wards of Okayama were established when Okayama became a city designated by government ordinance on April 1, 2009.