The 1906 Yorkshire Cup was the second in the Rugby Football League club tournament's history. It was a knock-out competition between (mainly professional) rugby league clubs from the English county of Yorkshire. The actual area was at times increased to encompass other teams from outside the county such as Newcastle, Mansfield, Coventry, and even London (in the form of Acton & Willesden. 1906 was the second occasion on which the Yorkshire Cup competition had been held. This year there were two new clubs to contest the final.