Bulbinella rossii, commonly known as the Ross lily, is a species of flowering plant in the family Asphodelaceae. It is an endemic megaherb of New Zealand's subantarctic Auckland Islands and Campbell Island. It was first described in 1845 by Joseph Dalton Hooker in the Flora Antarctica, from material collected on Campbell Island, as Chrysobactron rossii.

Bulbinella rossii reaches a height of up to 1 metre (3 feet 3 inches). Its leaves are strap-like, dark-green in colour and are up to 0.6–1 metre (2 feet 0 inches – 3 feet 3 inches) long. Its inflorescences (flower clusters) have a cylindrical raceme up to 600 mm long, with densely crowded golden-yellow flowers. The roots of B. rossii are often eaten by introduced pigs, but the species is avoided by cattle, goats and sheep. B. rossii occurs from sea level to high-altitude areas and prefers colder habitats with high water content. B. rossii was evaluated in the 2024 assessment by the New Zealand Threat Classification System as "At Risk — Naturally Uncommon". B. rossii is featured on the reverse of the New Zealand five-dollar note.

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