| Sport | Rugby union |
|---|---|
| Founded | 1909 |
| No. of teams | 10; See teams |
| Country | Melbourne, Victoria, Australia |
Most recent champion | Power House (2026) |
| Most titles | Unicorns (20) |

The Dewar Shield is a rugby union competition in Melbourne. It is the premier amateur rugby competition in Victoria. A total of ten teams from the Victorian Rugby Union compete for the Shield. Clubs must field teams in 3 grades, Dewar Shield Reserves (Penwill Cup) and Dewar Shield 3rd Grade (Mawhinney Cup), to be eligible to compete.
A "Game of the week" is streamed on the Rugby Victoria Facebook Page.
The Victorian Rugby Union senior competition was established in 1909 with five teams, namely East Melbourne, Melbourne Unicorns, South Melbourne, St Kilda and University. Melbourne Unircorns won the first year of the five-team competition for the new trophy the Dewar Shield (donated by the Scotch Whisky Distillery John Dewar and Sons). One hundred years later in 2009 Melbourne Unicorns once again won the premiership defeating Box Hill in the Grand Final for the same Dewar Shield.
The Current (2026) Premiers are Power House who defeated Harlequins 39-36 in the Grand Final held at Box Hill
2026 was the 100th time the Dewar Shield had been awarded, due to the competition not being run during War Years, with Power House successfully defending their crown to win the historic 100th Grand Final and to complete a "Threepeat", having won the two years before.
The Premier competition is contested by ten clubs with each club fielding two teams (1st Grade, Reserve Grade). Other senior competitions offered are Metro 2nd Division with an A, B & C Grade, Colts (U20), Country, Women and Masters (over 35s).
A number of clubs have dominated the 1st Grade over the years. Melbourne Unicorns has the most number of Premierships with 20. Moorabbin holds the record for consecutive Premierships, winning six in a row from 1981 to 1986. Other prominent clubs during this 100-year period include Melbourne University, Power House and Navy.
Footscray and Endeavour Hills were promoted to the Premier division for the 2011 season.
| Est. | Colours | Club | Location | Home Ground | Nickname | Admitted to Premier Grade | Premierships (most recent) |
|---|---|---|---|---|---|---|---|
| 1958 | Box Hill | Box Hill | RHL Sparks Reserve | Broncos | 1966 | 3 (2001) | |
| 1979 | Endeavour Hills | Endeavour Hills | Frog Hollow Reserve | Eagles | 2007 | ||
| 1928 | Footscray | Footscray | Henry Turner Memorial Reserve | Bulldogs | 1928 | 3 (1937) | |
| 1928 | Melbourne Harlequins | Ashwood | Ashwood Reserve | Quins | 1930 | 12 (2023) | |
| 1909 | Melbourne Unicorns | Armadale | Romanis Reserve, Orrong Park | Unicorns | 1929 | 20 (2019) | |
| 1909 | Melbourne University | Parkville | Royal Park | Students | 1910 | 6 (1967) | |
| 1965 | Moorabbin | Moorabbin | Keys Rd Reserve | Rams | 1965 | 15 (2012) | |
| 1933 | Power House | Albert Park | Noel Clarke Field | House, The Society | 1936 | 14 (2026) | |
| 1923 | Kiwi Hawthorn | Hawthorn | Lewin Reserve | Kiwis | 1987, (1923 as The Kiwi Club) | 13 (1996) | |
| 2011 | Brimbank | Deer Park | Bon Thomas Reserve | Bucks | 2026 |
Victorian Rugby Union Premiership winners
(list may not be complete)
b Southern Districts now play in the Premiership competition.