The Johns River is a small tidal river in the U.S. state of Washington. Along with the Elk River, it drains the far north-western portion of the Willapa Hills. It flows into Grays Harbor near Markham.
It is noted for the wildlife area near the mouth, providing waterfowl-hunting opportunities.
Coordinates: 46°54′28″N 124°00′44″W / 46.9078°N 124.0123°W