Shimoina District, Nagano
is a district located in southern Nagano Prefecture, Japan.

As of May 2008, the district has an estimated population of 65,359 with a density of 51.4 persons per km2. The total area is 1,270.43 km2.

Municipalities 
The district consists of three towns and ten villages:

 Anan
 Achi
 Hiraya
 Matsukawa
 Neba
 Ōshika
 Shimojō
 Takagi
 Takamori
 Tenryū
 Toyooka
 Urugi
 Yasuoka

Notes

History 

 January 4, 1879 - Ina District was split off into Kamiina and Shimoina Districts during the early Meiji period establishment of the municipalities system, which initially consisted of 1 town and 31 villages. Its district headquarters was located at the village of Iida.

District Timeline 
 July 1, 1993 - The town of Kamisato was merged into the expanded city of Iida.

Recent mergers 
 October 1, 2005: The villages of Kami and Minamishinano were merged into the expanded city of Iida.
 January 1, 2006: The village of Namiai was merged into the expanded village of Achi.
 March 31, 2009: The village of Seinaiji was merged into the expanded village of Achi.

References 

Districts in Nagano Prefecture
States and territories established in 1878
1878 establishments in Japan