List of Welsh rugby union clubs by division

Rugby union in Wales is governed by the Welsh Rugby Union. The top level of Welsh rugby is represented by the regional sides, formed in 2003, who play in the Guinness Pro12 League (formerly the Magners League or Celtic League). Originally consisting of five teams, there are currently four regional sides in the RaboDirect Pro12, after the Celtic Warriors were wound up in 2004.

List of Welsh rugby union clubs by division

Rugby union in Wales is governed by the Welsh Rugby Union. The top level of Welsh rugby is represented by the regional sides, formed in 2003, who play in the Guinness Pro12 League (formerly the Magners League or Celtic League). Originally consisting of five teams, there are currently four regional sides in the RaboDirect Pro12, after the Celtic Warriors were wound up in 2004.