Ragwort may refer to a number of plant species:
- Certain members of the genus Senecio (ragworts and groundsels) including:
- Senecio ampullaceus, Texas ragwort
- Senecio cambrensis, Welsh ragwort
- Senecio squalidus, Oxford ragwort
- Senecio viscosus, sticky ragwort
- Certain members of the genus Jacobaea (a segregate of Senecio):
- Jacobaea vulgaris, (common) ragwort or, only in the USA tansy ragwort, a very common wild flower in Europe, widely naturalised elsewhere
- Jacobaea aquatica, water ragwort, marsh ragwort
- Jacobaea erucifolia, Hoary ragwort
- Certain members of the genus Packera including:
- Packera obovata, Roundleaf ragwort
- Packera aurea, golden ragwort
- Certain member of the genus Pericallis including:
- Pericallis × hybrida, common ragwort
- Certain members of the genus Rugelia including:
- Rugelia nudicaulis, Rugels ragwort, a wildflower found only in the Great Smoky Mountains