'''Masterwort''' is a common name for several plants in the family Apiaceae and may refer to:
*''Astrantia'', a genus with several plant species cultivated as ornamentals *''Heracleum'', a genus of plants known for their phototoxic effects *''Peucedanum ostruthium'', a species used as an herbal flavoring *''Aegopodium podagraria'', a species that is sometimes called English masterwort or wild masterwort
{{Gallery |title=Plants called masterwort |width=250 |height=170 |File:Astrantia major02.jpg|''Astrantia major'' |File:Heracleum lanatum 07269.JPG|''Heracleum lanatum'' |File:Peucedanum ostruthium - Köhler–s Medizinal-Pflanzen-236.jpg|Drawing of ''Peucedanum ostruthium'' }}
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