2006–07 Welsh Premier Division
The 2006–07 Welsh Premier Division or 2006–07 Principality Premiership for sponsorship reasons was the sixteenth Welsh Premier Division. The season began on Saturday 2 September 2006 and ended on Saturday 5 May 2007. Fourteen teams played each other on a home and away basis. This was also the last season where teams earned three points for a win and one point for a draw.
Stadiums
| Team | Stadium | Capacity | City/Area |
| Aberavon RFC | Talbot Athletic Ground | 5,000* | Port Talbot, Neath Port Talbot |
| Bedwas RFC | Bridge Field | 2,000 | Bedwas, Caerphilly |
| Bridgend RFC | Brewery Field | 12,000 | Bridgend |
| Cardiff RFC | Cardiff Arms Park | 14,000 | Cardiff |
| Cross Keys RFC | Pandy Park | 3,000 | Crosskeys, Caerphilly |
| Ebbw Vale RFC | Eugene Cross Park | 8,000 | Ebbw Vale, Blaenau Gwent |
| Glamorgan Wanderers RFC | The Memorial Ground | 3,000 | Ely, Cardiff |
| Llandovery RFC | Church Bank Playing Fields | 5,000 | Llandovery, Carmarthenshire |
| Llanelli RFC | Stradey Park | 10,800 | Llanelli, Carmarthenshire |
| Maesteg RFC | Llynfi Road | N/A | Maesteg, Bridgend |
| Neath RFC | The Gnoll | 5,000 | Neath, Neath Port Talbot |
| Newport RFC | Rodney Parade | 11,700 | Newport |
| Pontypridd RFC | Sardis Road | 7,861 | Pontypridd, Rhondda Cynon Taf |
| Swansea RFC | St. Helen’s Ground | 4,500 | Swansea |
- 1,500 of them are seats
Table