Ōno (大野郡, Ōno-gun) was a district located in Fukui Prefecture, Japan.

As of 2003, the district had an estimated population of 701 with a density of 2.11 persons per km². The total area was 332.38 km².

Prior to its dissolution, the district consisted of only one village:

• Izumi^[a]

Notes

• On November 7, 2005 - The village of Izumi was merged into the expanded city of Ōno. Ōno District was dissolved as a result of this merger.

• List of dissolved districts of Japan