Goatweed may refer to:
Plants Ageratum, a genus of plants in the family Asteraceae, particularly: Ageratum conyzoides a weed or garden flower Ageratum houstonianum a popular garden flower and sometimes a weed, blue billy goat weed Capraria biflora, a species of plant in the family Scrophulariaceae Croton (plant), a genus of plants in the family Euphorbiaceae Hypericum perforatum, a species of plant in the family Hypericaceae Hypericum erectum, a species of plant in the family Hypericaceae
Other Anaea andria, a species of butterfly
See also Horny goat weed