is a district located in Nagano Prefecture, Japan.
As of 2003, the district has an estimated population of 25,179 with a density of 59.50 persons per km<sup>2</sup>. The total area is 423.19 km<sup>2</sup>.
Municipalities
The district consists of one town and two villages:
- Kijimadaira
- Nozawaonsen
- Yamanouchi
;Notes:
History
thumb|320px|right|Map showing original extent of Shimotakai 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.