Potamogeton richardsonii is a species of aquatic plant known by the common name Richardson's pondweed.

It grows in water bodies such as ponds, lakes, ditches, and streams.

This perennial herb grows a narrow, mostly unbranched stem from a mat of rhizomes in the substrate.

The leaves are up to 13 centimeters long and about 3 wide with crinkly pointed or rounded tips.

The inflorescence is a spike of flowers arising from the water surface on a peduncle.