Shimoina (下伊那郡, Shimoina-gun) is a district located in Nagano Prefecture, Japan.

As of May, 2008, the district has an estimated Population of 65,359 and a Density of 51.4 persons/km². The total area is 1,270.43 km².


There are 3 towns and 10 villages within the district.


  • 1878: The district was formed out from Ina District. The seat was located at Iida.
  • July 1, 1993: The town of Kamisato merged into the expanded city of Iida.
  • October 1, 2005: The villages of Kami and Minamishinano merged into the expanded city of Iida.
  • January 1, 2006: The village of Namiai merged into the village of Achi.
  • March 31, 2009: The village of Seinaiji merged into the village of Achi.[1]


  1. ^ "Archived copy". Archived from the original on 2008-04-18. Retrieved 2008-09-07.CS1 maint: archived copy as title (link)

Coordinates: 35°25′55″N 137°44′24″E / 35.432°N 137.74°E / 35.432; 137.74