Matsumae District, Hokkaido

 is a district located in southwestern Oshima Subprefecture, Hokkaido, Japan.
As of 2004, the district has an estimated population of 16,068 and a density of 33.45 persons per km2. The total area is 480.32 km2.
Geography.
The district is located on the southern end of the Matsumae Peninsula. The district includes the two islands in the Tsugaru Strait, Oshima and Kojima.