Helianthus is a genus of plants comprising sunflowers.

Helianthus may also refer to:

USS Helianthus (SP-585), U.S. Navy patrol boat Helianthus III, a yacht listed on the National Register of Historic Places Heliaster helianthus, a species of starfish Stichodactyla helianthus, a species of sea anemone

See also Actinia helianthus (disambiguation) Sunflower (disambiguation)