Matsumae (松前郡 Matsumae-gun?) 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.
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.
Coordinates: 41°31′16″N 140°09′00″E / 41.521°N 140.15°E