The Passadumkeag River is a river in Maine.
From the confluence of its East Branch and West Branch () in Maine Township 3, Range 1, NBPP, the river runs  south and west to its mouth on the Penobscot River in Passadumkeag.

East Branch 
From the outflow of Weir Pond () the stream runs  south to its confluence with the West Branch.

West Branch 
From the outflow of Number 3 Pond () the stream runs  southeast to its confluence with the East Branch.

See also
List of rivers of Maine

References

Maine Streamflow Data from the USGS
Maine Watershed Data From Environmental Protection Agency

Rivers of Hancock County, Maine
Rivers of Penobscot County, Maine
Tributaries of the Penobscot River
North Maine Woods
Rivers of Maine