Higashiiwai (東磐井郡 Higashiiwai-gun?) was a district located in Iwate Prefecture, Japan.
As of September 1, 2005, the district had an estimated population of 10,026. The total area was 123.15 km².
The day before the dissolution on September 25, 2011, the district had only one town.
On September 26, 2011, the town of Fujisawa was merged with the expanded city of Ichinoseki. Higashiiwai District was dissolved as a result of this merger.
Coordinates: 38°56′05″N 141°07′36″E / 38.93472°N 141.12667°E