Apiaceae ( ), also called Umbelliferae, is a family of mostly aromatic flowering plants named after the type genus Apium, and commonly known as the celery, carrot, or parsley family, or simply as umbellifers. It is the 16th-largest family of flowering plants, with more than 3,800 species in about 446 genera, including such well-known, and economically important plants as ajwain, angelica, anise, asafoetida, caraway, carrot, celery, chervil, coriander, cumin, dill, fennel, lovage, cow parsley, parsley, parsnip and sea holly, as well as silphium, a plant whose exact identity is unclear and which may be extinct.

The family Apiaceae Aldo includes a significant number of phototoxic species, such as giant hogweed and parsnip, alongside a smaller number of deadly toxic paralytic species, such as poison hemlock, water hemlock, spotted cowbane, fool's parsley, and various species of water dropwort.

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