Ragweeds are flowering plants in the genus Ambrosia in the aster family, Asteraceae.
Ragweed may also refer to:
Bassia scoparia, a shrub native to Eurasia Jacobaea vulgaris, also known as ragwort Cross Canadian Ragweed, an alternative country band
See also List of plants known as ragwort Ragweed leaf beetle, two beetles in the family Chrysomelidae