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 km<sup>2</sup>. The total area is 254.79 km<sup>2</sup>.
Municipalities
The district consists of two towns and one village:
- Fujimi
- Hara
- Shimosuwa
;Notes:
History
thumb|320px|right|Map showing original extent of Suwa District in [[Nagano Prefecture:<br /><br />* yellow - areas formerly within the district borders during the early Meiji period<br /> ]]
260px|thumb|right|Colored areas are in this district.
- 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.