Four of the top five clubs from the 1901–02 Lancashire Senior Competition; Hull Kingston Rovers (although based in Yorkshire, and having played in the Yorkshire Senior Competition for the 1899–1900 and 1900–01 seasons, they had played the 1901–02 season in the Lancashire Senior Competition), St. Helens, Widnes, and Wigan joined the 14-clubs from the previous season's 1901–02 Northern Rugby League to make an 18-club Division 1, the exception was Barrow who despite finishing fourth in the 1901–02 Lancashire Senior Competition joined Division 2.
^"Bradford City History". Transformation of Valley Parade. Bradford City Football Club. Archived from the original on 2008-10-09. Retrieved 2010-03-02.
^"Valley Parade History". The Dawn of Football at Valley Parade. The Bradford City Football Club Museum. Archived from the original on 2011-08-12. Retrieved 2010-03-02.