Ōi District, Fukui
Ōi (大飯郡, Ōi-gun) is a district located in Fukui Prefecture, Japan.
As of 2003, the district had an estimated population of 18,680 with a density of 133.18 persons per km2. The total area is 140.26 km2.
Municipalities
The district consists of two towns:
- Notes
History

* yellow - areas formerly within the district borders during the early Meiji period
- Ōi-machi
- Takahama-machi

District Timeline
Recent mergers
- On March 3, 2006 - The village of Natashō (from Onyū District) was merged into the expanded town of Ōi.