New South Wales Suburban Rugby Union

Sydney rugby in the early years was played by Senior teams and Junior teams (where Junior denoted the second tier, not the age of the players).[4][5] The Senior competition was run by the Southern Rugby Union (SRU, later to become the NSWRU) and had been in existence from 1874, but matches for Junior sides were arranged on an ad hoc basis until after the 1885 season. The SRU only began to involve itself in rugby for Junior teams in 1882, and only established a formal Junior competition in 1886.

Some of the clubs in the original Junior competition were Petersham (who still exist in the Suburban competition today), Manly Federals, the Warrigals and Wentworth. Most of these clubs fielded one team and the competition received coverage in Sydney's newspapers under "Other matches".[6] By 1896, in an early sign of what later led to the schism with rugby league, tensions emerged with suggestions that Senior clubs were trying to poach players with talent at Junior clubs using ‘incentives’ and that Junior players were being paid a match fee.[7]

A new branch of the NSWRU called the Metropolitan Rugby Union (MRU) was formed in 1897 to administer the Sydney competitions and re-organise the clubs along district lines. The previous Junior clubs and players were essentially merged into new district clubs. More than twenty Junior clubs, including foundation members of the union, vanished from the books in 1898.[5]

Most clubs that were disenfranchised in the move to district football between 1897 and 1900 simply went out of existence but a few, such as Petersham, continued playing matches between themselves beyond the control of the MRU and NSWRU. In 1901 the competition was formally organised under the City and Suburban Association, making it the earliest forerunner of today's Subbies rugby.[5]

To counter this new rebel association, the MRU created its own Borough competition in 1902. Several of the leading City and Suburban clubs switched to this competition but, with the start of rugby league in 1908, it did not continue.[5] With the advent of the Great War in 1914, most rugby union clubs ceased playing altogether and rugby league had won ascendancy in New South Wales.[8]

After the war was ended, the NSWRU established one competition for the 1919 season with divisions for both non-district and district clubs.[5] The Mosman Rugby Club, as the winner of the Reserve Grade B division (effectively the first grade for non-district clubs), was presented with a cup donated by W.H. Kentwell in 1923.[9] This began the long history of the Kentwell Cup which is now awarded to the NSWSRU first grade premiers in first division. The Burke Cup, was first presented to the Mosman club's second grade winning side in 1924 by James A. Burke, and is now contested by NSWSRU second grade teams in first division.[9]

The NSWRU formed a separate non-district club competition in 1929, which became the Metropolitan Sub-Districts Rugby Union in 1933. The Whiddon Cup was inaugurated in 1933 by Horace Whiddon of the Briars Club, and is now awarded to the NSWSRU third grade premiers.[9]

At the start of the war in 1939 the NSWRU decided to cancel representative games but continue with club competitions. This was an attempt to ward off a repeat of the setback caused by the cessation of rugby during the previous war.[10] All sports were ravaged during the war. Players and officials died or were injured during battle or as prisoners of war but, as at least a restricted form of the game was continued, rugby union was able to be successfully revived in 1946.

After the war, Subbies rugby grew strongly. In 1966 Petersham made history as being the first club to circle the world on a rugby tour.[5] The Sydney Sub-Districts Rugby Union was established in 1971, and the Subbies competition was rearranged into three divisions.

In 1990, the Subbies became known as the New South Wales Suburban Rugby Union. The second division of the Sydney district competition was absorbed into Subbies in 1993 and 18 clubs contested the Kentwell Cup in that year. Drummoyne,[11] Mosman, University of NSW and Hornsby, Hawkesbury Agricultural College, Canterbury, Dundas Valley, Hawkesbury Valley are former district clubs that moved to Subbies.

Most current clubs are based on a local community, links with schools, or voluntary groups. Old Ignatians, St Patricks, Barker Old Boys, Knox Rugby Club, Waverley, Kings Old Boys, and Oakhill are or were formed from ex-students of schools. The Bronte and Manly Savers clubs are composed of members of surf lifesaving clubs.

Promotion and relegation is based on club championship results down to third division.