The Sydney Roosters are an Australian professional rugby league football club based in the Eastern Suburbs (Sydney). The club competes in the National Rugby League (NRL) competition and is one of the oldest and most successful. The Roosters have won fifteen New South Wales Rugby League (NSWRL) and National Rugby League titles, and several other competitions. Founded as the Eastern Suburbs District Rugby League Football Club (ESDRLFC), it is the only club to have played in each and every season at the elite level, and since the 1970s has often been dubbed the glamour club of the league.The Sydney Roosters have won 15 premierships, equal to the record of the St George Dragons. Only the South Sydney Rabbitohs have won more premierships. The club holds the record for having won more matches than any other in the league, the most minor premierships and the most World Club Challenge trophies. The Sydney Roosters are one of only two clubs (the other being the St. George Illawarra Dragons in 1999) to finish runner-up in its inaugural season. Currently coached by Trent Robinson and captained by James Tedesco, the Roosters play home games at the Sydney Cricket Ground.

The club was founded in 1908 in Paddington, Sydney, as Eastern Suburbs; in 1995 the club's name was changed to the Sydney City Roosters, and in 2000 to the Sydney Roosters. The team's Leagues Club is based in Bondi Junction and its home ground, administration and training facilities are located at nearby Moore Park. The Roosters have long-standing and fierce rivalries with other Sydney-based clubs, especially the South Sydney Rabbitohs, a fellow foundation club based in neighbouring Redfern.