Lumbinī (Nepali: लुम्बिनी pronounced [ˈlumbini] , "the lovely") is a Buddhist pilgrimage site in the Rupandehi District of Lumbini Province in Nepal. It is the place where, according to Buddhist tradition, queen Maya gave birth to Siddhartha Gautama at around 566 BCE. Gautama, who, according to Buddhist tradition, achieved Enlightenment some time around 528 BCE, became Shakyamuni Buddha and founded Buddhism. Lumbini is one of many magnets for pilgrimage that sprang up in places pivotal to the life of the Buddha.

Lumbini has a number of old temples, including the Mayadevi Temple, and several new temples, funded by Buddhist organisations from various countries. Most of the temples have already been completed and some are still under construction. Many monuments, monasteries and a museum, and the Lumbini International Research Institute are also within the holy site. Also, there is the Puskarini, or Holy Pond, where Mayadevi, the Buddha's mother, is believed to have taken the ritual dip prior to his birth and where he also had his first bath. At other sites near Lumbini, earlier Buddhas were, according to tradition, born, then achieved ultimate Enlightenment and finally relinquished their earthly forms. The Government of Bangladesh is currently constructing a major Buddhist Monastery in Lumbini.

Lumbini was made a World Heritage Site by UNESCO in 1997.