The 2005 National Lacrosse League season is the 19th season of the NLL that began on January 1, 2005 and concluded with the championship game on May 14. The Toronto Rock won their fifth NLL championship, defeating the Arizona Sting 19–13 in Toronto. Colin Doyle of the Toronto Rock won the scoring title, marking the first time since 1990 that someone other than Gary Gait, Paul Gait, or John Tavares has led the league in scoring. For his efforts in leading the Rock to the championship, Doyle was named both league MVP and Championship Game MVP.