Negombo is a major city in Sri Lanka, situated on the west coast and at the mouth of the Negombo Lagoon, in the Western Province, 38 km (24 mi) from Colombo via the Colombo–Katunayake Expressway and the nearest major city from the Bandaranaike International Airport.

The Western Province is one of the nine provinces of Sri Lanka, the first level administrative division of the country. The provinces have existed since the 19th century but did not have any legal status until 1987 when the 13th Amendment to the Constitution of Sri Lanka established provincial councils. Western Province is the most densely populated province in the country and is home to the legislative capital Sri Jayawardenepura Kotte as well as to Colombo, the nation's administrative and business center.