The Manly Warringah Sea Eagles are an Australian professional rugby league club based in Sydney's Northern Beaches. They compete in Australia's premier rugby league competition, the National Rugby League (NRL). The club debuted in the 1947 New South Wales Rugby Football League season and currently host the majority of their home games from Brookvale Oval in Brookvale, while training at the New South Wales Academy of Sport in Narrabeen and their Centre of Excellence in Brookvale. The team colours are maroon and white, and are commonly known as Manly or the Sea Eagles.

Rugby league football, commonly known as rugby league in English-speaking countries and rugby XIII in non-Anglophone Europe and South America, and referred to colloquially as rugby, football, footy or league in its heartlands, is a full-contact sport played by two teams of thirteen players on a rectangular field measuring 68 m (74 yd) wide and 112–122 m (122–133 yd) long with H-shaped posts at both ends. It is one of the two major codes of rugby football, the other being rugby union. It originated in 1895 in Huddersfield, Yorkshire, England, as the result of a split from the Rugby Football Union (RFU) over the issue of payments to players. The rules of the game governed by the new Northern Rugby Football Union progressively changed from those of the RFU with the specific aim of producing a faster and more entertaining game to appeal to spectators, on whose income the new organisation and its members depended.