Kamiina District, Nagano

 is a district located in Nagano Prefecture, Japan.
As of May, 2008, the district has an estimated Population of 86,453 and a Density of 168 persons/km2. The total area is 514.55 km2.
There are 3 towns and 3 villages within the district.
On the other hand, if the cities of Ina and Komagane were included, the area will be known as the Kamiina Region.