Stenelmis gammoni is a species of beetle in the riffle beetle family, Elmidae.

It is known by the common name Gammon's riffle beetle.

[1] The beetle is native to the United States.

[2] Its total distribution is still unclear, but it has been found in Virginia and Alabama as well.

[1] The specimens used in the original species description were dark brown to black beetles with elongated, convex bodies measuring between 2 and 3 millimetres (0.079 and 0.118 in) long.