1999 Super League season

JJB Sports Super League IV was the official name for the year 1999's Super League championship season, the 105th season of top-level professional rugby league football in Britain, and the fourth championship run by the Super League. The start of Super League IV saw the emergence of a North East based Rugby League Club, Gateshead Thunder as well as newly promoted Wakefield Trinity Wildcats to expand the league to fourteen teams.

Rule changes

 * The 40/20 rule was introduced to reward accurate kicking in general play. The rule, which had been used in Australia since 1997, gave the head and feed at the resulting scrum to a team that kicked the ball from behind their 40-metre line so that it bounced in the field of play before going into touch behind their opponent's 20 metre line.