Manly Rugby Union Football Club is a rugby union club based in Manly, a suburb of Sydney. The club was formed in 1883 and competes in the New South Wales Rugby Union competitions, the Charter Hall Shute Shield.

Manly, known as the Marlins, play their home games at Manly Oval and train at Keirle Park.

Manly Beaches and Manly Districts merged to form Manly RUFC. The District team's colours were chosen to represent to new club, whilst Beach's homeground, Manly Oval, was used for the merged club.

Manly joined the first grade in 1906, but have roots back to 1883. The current club colours of red and blue came into being in the late 1900s. The club were a great force in the 1920s and 1930s. In 1950 Manly won both the first grade and reserve grade titles in the same season. However, there were no titles for over 30 years, until 1983, under coach Alan Jones, though the club, while playing entertaining running rugby, could not produce consistent results. In 1997 the club again won the first grade title. In 2006 Manly celebrated 100 years of rugby.

• Shute Shield Titles (1st Grade): 7 (1922, 1932, 1942, 1943, 1950, 1983, 1997)
• Melrose Sevens Winners (1): 1995