Neelagiriseya (Sinhalaː නීලගිරිසෑය) is an ancient colossal Stupa situated in Lahugala, Ampara District, Sri Lanka.

[5] In the recent history the Stupa and its monastery site had been neglected and abandoned over three decades as the rise of activities of military organization LTTE (Tamil Tigers) in the area.

[3] According to an inscription belongs to the 1st century, found during the archaeological excavations done in 2011, describes about a grant to the temple by the Maharaajinee Chula Sivalee Queen, a daughter of the King Bhatikabaya.

[6] In historical resources Bhatikabaya is described as a viceroy, who reigned in Ruhuna when King Kutakanna Tissa (42-20 BC) was ruling the country.

In 2011 a survey was carried out as a pre-requisite of the proposed restoration of the Stupa by a team consisted of 13 archaeologists, funded by the department of archaeology.