Mii (三井郡, Mii-gun) is a district located in Fukuoka Prefecture, Japan.
As of 2003 statistics (but following the merger of Kitano), the district has an estimated population of 15,378 and a density of 674 persons per km2. The total area is 22.83 km2.
33°23′19″N 130°36′25″E / 33.3887°N 130.607°E / 33.3887; 130.607