Iruma (入間郡 Iruma-gun?) is a district located in Saitama Prefecture, Japan.
In the 2005 census reports, the district has an estimated population of 89,552. The total area is 89.77 km².
The district consists of three towns:
Coordinates: 35°55′16″N 139°17′49″E / 35.921°N 139.297°E