Koshi District, Niigata

Map showing original extent of Koshi District in Niigata Prefecture:

* yellow - areas formerly within the district borders during the early Meiji period

Koshi (古志郡, Koshi-gun) was a district located in Niigata Prefecture, Japan.

As of 2003, the district had an estimated population of 2,035 with a density of 51.09 persons per km2. The total area is 39.83 km2.