Higashiokitama (東置賜郡, Higashiokitama-gun) is a rural district located in Yamagata Prefecture, Japan. As of December 2013,[update] the district had an estimated population of 40,662 and an area of 324.5 km3. All of the city of Nan'yō and parts of the cities of Yonezawa, Nagai, Kaminoyama were formerly part of Nishiokitami District.