The 1999 National Lacrosse League season is the 13th season in the NLL that began on December 26, 1998, and concluded with the championship game on April 23, 1999. The Toronto Rock celebrated their first season in Toronto by winning the championship, defeating the Rochester Knighthawks 13-10 at Maple Leaf Gardens. The playoffs featured the lowest score by a team in NLL history, when goaltender Bob Watson and the Toronto Rock defeated the Philadelphia Wings 13-2.