Suwa (諏訪郡, Suwa-gun or Suwa no Kōri) is a district located in southern Nagano Prefecture, Japan.
As of 2003, the district has an estimated population of 46,162 with a density of 181.18 persons per km2. The total area is 254.79 km2.
Municipalities
The district consists of two towns and one village:
- Notes
- Classified as a town.
- Classified as a village.
History

* yellow - areas formerly within the district borders during the early Meiji period
- Shimosuwa-machi
- Fujimi-machi
- Hara-mura

- January 4, 1879 - Suwa District was created during the early Meiji period establishment of the municipalities system, which initially consisted of 24 villages. Its district headquarters was located at the village of Kamisuwa.