was a district located in Hyōgo Prefecture, Japan.
As of 2003, the district had an estimated population of 53,638 and a density of 234.05 persons per km<sup>2</sup>. The total area was 229.17 km<sup>2</sup>.
Former towns and villages
- Midori
- Mihara
- Nandan
- Seidan
Merger
- On January 11, 2005 - the towns of Midori, Mihara, Nandan and Seidan were merged to create the city of Minamiawaji. Mihara District was dissolved as a result of this merger.
