Washingtonia robusta (Mexican fan palm or Mexican washingtonia) is a palm tree native to western Sonora, and Baja California Sur in northwestern Mexico. It is reportedly naturalized in Florida, California, Hawaii, parts of the Canary Islands, Italy, Spain, and Réunion.
Like the closely related Washingtonia filifera (California Fan Palm), it is grown as an ornamental tree. Although very similar, the Mexican Washingtonia has a narrower trunk (which is typically somewhat wider at the base), and grows slightly faster and taller; it is also somewhat less cold hardy than the California Washingtonia, hardy to about −8 °C (18 °F).
Field research conducted on Washingtonia robusta in its native habitat on the Baja California peninsula concluded that its potential longevity may exceed 500 years.