thumb|Location of Sera District in Hiroshima Prefecture
is a district located in Hiroshima Prefecture, Japan.
As of 2020, the district has an estimated population of 15,125 and a density of 54.38 persons per km<sup>2</sup>. The total area is 278.1 km<sup>2</sup>.
Towns and villages
- Sera
Merger
- On October 1, 2004 all three towns in the district merged into the single expanded town of Sera. The other two former towns were Kōzan and Seranishi.