thumb | 220x124px | right | Map of Hamamasu
was a district located in Ishikari Subprefecture, Hokkaido, Japan.
As of 2004, the district had an estimated population of 2,179 and a density of 7.00 persons per km<sup>2</sup>. The total area was 311.16 km<sup>2</sup>.
Former towns and villages
- Hamamasu
Merger
- On October 1, 2005, the village of Hamamasu, along with the village of Atsuta (from Atsuta District), was merged into the expanded city of Ishikari.