Black Ash Swamp is a small lake located northwest of Lordville in Delaware County, New York. Blue Mill Stream flows into the lake from the north, it drains south-southwest via Blue Mill Stream, which flows into the Delaware River. Somerset Lake is located northeast of Black Ash Swamp.
| Black Ash Swamp | |
|---|---|
  Black Ash Swamp Location of Black Ash Swamp within New York | |
| Location | Delaware County, New York |
| Coordinates | 41°54′04″N 75°14′48″W / 41.9012311°N 75.2467915°W |
| Primary inflows | Blue Mill Stream |
| Primary outflows | Blue Mill Stream |
| Surface area | 25 acres (0.039 sq mi) |
| Surface elevation | 1,358 feet (414 m)[1] |
| Settlements | Lordville |