Bolboschoenus fluviatilis, the river bulrush, is a species of flowering plant in the sedge family, Cyperaceae.

[1] Its range includes Australia, New Zealand, New Caledonia, Canada, the United States, and northeastern Mexico.

[2][3] B. fluviatilis and its fruits are important as food sources for waterfowl such as geese, ducks, bitterns, and swans.

Like other Bolboschoenus species, B. fluviatilis has strong tubers and rhizomes which help to stabilize intertidal habitats by preventing erosion.

It has been shown to propagate and flourish in a wide variety of water depths, but produces the most biomass in shallowly flooded conditions.