The 2015 Bill Beaumont Cup, also known as Bill Beaumont Cup Division One, was the 115th version of the annual, English rugby union, County Championship organized by the RFU for the top tier English counties. Each county drew its players from rugby union clubs from the third tier and below of the English rugby union league system (typically National League 1, National League 2 South or National League 2 North). The counties were divided into two regional pools with the winners of each pool meeting in the final held at Twickenham Stadium. New counties to the competition were the two finalists from the 2014 County Championship Plate – Kent (winners) and Durham County (runners-up) who replaced North Midlands and Northumberland. Lancashire were the defending champions.