Ell Pond is a kettle hole in Hopkinton, Washington County, Rhode Island.

It is surrounded by a swamp of red maple and Atlantic white cypress, and by steep granitic monadnocks.

The small area contains communities of both hydrophytic and xeric plants, which makes it ideal for ecological research and education.

There are hiking trails in the preserve, but Ell pond is specifically not reachable due to its fragile environment.

As of 2025, Ell Pond is the only listed National Natural Landmark in Rhode Island.