Motosu District (本巣郡 Motosu-gun?) is a district located in Gifu Prefecture, Japan.
As of July 2011 the district has an estimated population of 18,389. The total area is 5.17 km².
The district has only one town.
Coordinates: 35°25′54″N 136°41′27″E / 35.4317°N 136.6908°E