| Regional 1 South West | |
| Current Season: | 2024–25 Regional 1 South West |
| Sport: | Rugby union |
| Founded: | (as South West 1) |
| Teams: | 12 |
| Champion: | Devonport Services (1st title) |
| Season: | 2023–24 (promoted to National League 2 West) |
| Most Champs: | Bournemouth, Chinnor, Clifton, Dings Crusaders, Reading |
| Count: | 2 |
| Website: | England Rugby – South West Division |
Regional 1 South West (formerly South West Premier and National League 3 South West) is a level five league in the English rugby union system.[1] It is one of six leagues at this level. When this division began in 1987 it was known as South West Division 1. The format of the league was changed at the beginning of the 2009–10 season following reorganisation by the Rugby Football Union, and the name change from National League 3 to South West Premier was introduced for the 2017–18 season by the RFU in order to lessen confusion for what is a series of regional leagues. Regional 1 South West, is the highest regional rugby union league covering South West England. The club finishing in first place is promoted to National League 2 West. Relegated teams drop down to either Regional 2 South West or Regional 2 Severn, depending on their location.
Devonport Services are the current champions.
The season runs from September to April and comprises twenty-two rounds of matches, with each club playing each of its rivals, home and away. The results of the matches contribute points to the league as follows:
Nine of last years teams participate in this season's competition. Five of the teams are from Devon, while Cornwall, Gloucestershire and Wiltshire have two clubs each and Somerset one club. Devonport Services, as champions, are promoted to National League 2 West. Okehampton (11th) and Weston-super-Mare (12th) are relegated to Regional 2 South West and Regional 2 Severn respectively, while Marlborough (9th) is transferred from Regional 1 South Central.
| Team | Ground | Capacity | City/Area | Previous season | |
|---|---|---|---|---|---|
| Pottingham Road | 2,000 (575 seats) | 2nd | |||
| Astley Park | 1,800 (300 stand) | Brixham, Devon | 4th | ||
| Lobbingtons | 3rd | ||||
| Imperial Recreation Ground | 1,250 (250 stand) | Exmouth, Devon | 6th | ||
| Cross-in-Hand | Ivybridge, Devon | 9th | |||
| Polson Bridge | 3,000 (194 seats) | 5th | |||
| Regentsholme | 1,500 | 7th | |||
| The Common | Transferred from Regional 1 SC (9th) | ||||
| Redwell Road | 10th | ||||
| Ballards Ash | Promoted from Regional 2 Severn (1st) | ||||
| Sidmouth | Blackmore Field | Promoted from Regional 2 SW (1st) | |||
| Tregorrick Park | 4,000 (300 seats) | St Austell, Cornwall | 8th |
Nine of last years teams participate in this season's competition. Champions, Camborne were promoted to National League 2 West while Old Centralians (11th) and Drybrook (12th) were both relegated to Regional 2 Severn. Six of the teams are from Devon, while Cornwall, Gloucestershire and Somerset each have two clubs.