London 3 South West
London 3 South West is an English rugby union league at the eighth level of club rugby union in England involving sides based in Hampshire, Surrey and south-west London. Promoted clubs move into London 2 South West. Relegated clubs move into either Surrey 1 or Hampshire Premier depending on their location, with sides coming up from these divisions, although only 1st XV clubs are allowed in London 3 South West. Each year all clubs in the division also take part in the RFU Senior Vase - a level 8 national competition.
Teams for 2019–20
| Team | Ground | Capacity | City/Area | Previous season |
| Andover | Foxcotte Lane | Andover, Hampshire | 8th | |
| Basingstoke | Down Grange | 2,500 | Basingstoke, Hampshire | Promoted from Hampshire 1 |
| Effingham & Leatherhead | King George V Playing Fields | Effingham, Surrey | Relegated from London 2 SW | |
| Gosport & Fareham | Gosport Park | Gosport, Hampshire | Relegated from London 2 SW | |
| Old Georgians | St George's College | Addlestone, Surrey | 6th | |
| Old Tiffinians | Grists Memorial Ground | East Molesey, Surrey | 4th | |
| Portsmouth | The Rugby Camp | Portsmouth, Hampshire | 3rd | |
| Reeds Weybridge | North Avenue | Whiteley Village, Surrey | Promoted from Surrey 1 | |
| Trojans | Stoneham Lane | Eastleigh, Hampshire | 7th | |
| Warlingham | Limpsfield Road | Warlingham, Surrey | 9th | |
| Weybridge Vandals | Brownacres | Walton-on-Thames, Surrey | Promoted from Surrey 1 |
Teams for 2018–19
| Team | Ground | Capacity | City/Area | Previous season |
| Andover | Foxcotte Lane | Andover, Hampshire | Relegated from London 2 SW | |
| Battersea Ironsides | Burntwood Lane | Earlsfield, London | 4th | |
| Old Georgians | St George's College | Addlestone, Surrey | Promoted from Surrey 1 | |
| Old Whitgiftians | Whitgift Sports Club | South Croydon, London | Promoted from Surrey 1 | |
| Old Tiffinians | Grists Memorial Ground | East Molesey, Surrey | 8th | |
| Petersfield | Penn's Place | Petersfield, Hampshire | 9th | |
| Portsmouth | The Rugby Camp | Portsmouth, Hampshire | 3rd | |
| Teddington | Udney Park Sports Ground | Teddington, London | 6th | |
| Trojans | Stoneham Lane | Eastleigh, Hampshire | 5th | |
| United Services Portsmouth | Burnaby Road | 8,000 | Portsmouth, Hampshire | Promoted from Hampshire 1 |
| Warlingham | Limpsfield Road | Warlingham, Surrey | 7th | |
| Winchester | North Walls Park | Winchester, Hampshire | Relegated from London 2 SW |
Teams for 2017–18
| Team | Ground | Capacity | City/Area | Previous season |
| Basingstoke | Down Grange | 2,500 | Basingstoke, Hampshire | 5th |
| Battersea Ironsides | Burntwood Lane | Earlsfield, London | 7th | |
| New Milton & District | Ashley Recreation Ground | Ashley, New Milton, Hampshire | Promoted from Hampshire 1 | |
| Old Cranleighans | Old Cranleighan Sports Club | Thames Ditton, Surrey | 4th | |
| Old Emanuel | Blagdons Sports Ground | New Malden, London | Promoted from Surrey 1 | |
| Old Tiffinians | Grists Memorial Ground | East Molesey, Surrey | 3rd | |
| Petersfield | Penn's Place | Petersfield, Hampshire | Promoted from Hampshire 1 | |
| Portsmouth | The Rugby Camp | Portsmouth, Hampshire | Relegated from London 2 South West | |
| Teddington | Udney Park Sports Ground | Teddington, London | 8th | |
| Trojans | Stoneham Lane | Eastleigh, Hampshire | 6th | |
| Warlingham | Limpsfield Road | Warlingham, Surrey | Relegated from London 2 South West | |
| Weybridge Vandals | Brownacres | Walton-on-Thames, Surrey | 9th |
Participating Clubs 2016-17
- Battersea Ironsides
- Basingstoke '
- Bognor '
- Eastleigh
- Farnham
- Milbrook '
- Old Cranleighans '
- Old Tiffinians
- Teddington
- Trojans
- United Services Portsmouth
- Weybridge Vandals
Participating Clubs 2015-16
- Battersea Ironsides '
- Camberley '
- Eastleigh
- Farnham '
- New Milton & District
- Old Tiffinians
- Old Mid-Whitgiftian
- Old Tonbridgians
- Purley John Fisher
- Tadley '
- Teddington
- Trojans
Participating Clubs 2014-15
- Andover '
- Eastleigh
- Ellingham & Ringwood
- London Exiles
- New Milton & District
- Old Tiffinians '
- Old Mid-Whitgiftian
- Old Tonbridgians '
- Purley John Fisher
- Sandown & Shanklin
- Teddington '
- Trojans
Participating Clubs 2013-14
- Camberley '
- Eastleigh
- Ellingham & Ringwood
- Farnham
- KCS Old Boys '
- London Exiles
- New Milton & District
- Old Cranleighans
- Old Mid-Whitgiftian
- Old Wellingtonian
- Purley John Fisher
- Sandown & Shanklin
Participating Clubs 2012-13
- Bognor
- Eastleigh
- Ellingham & Ringwood
- London Exiles
- Old Blues
- Old Mid-Whitgiftian
- Old Paulines
- Old Wellingtonians
- Purley John Fisher
- Sandown & Shanklin
- Weybridge Vandals
- Winchester
London 3 South West Honours
Number of league titles
- Farnham
- Winchester
- Camberley
- Chobham
- Cobham
- Dorking
- Gosport & Fareham
- London Exiles
- Old Alleynians
- Old Cranleighans
- Old Reigatian
- Purley John Fisher
- Reeds Weybridge
- Richmond
- Teddington
- Tottonians
- Warlingham
- Weybridge Vandals