The International Lacrosse Federation (ILF) World Championship began as a four-team invitational tournament that coincided with Canada's centennial lacrosse celebration in 1967. The Mt. Washington (Md.) Lacrosse Club represented the United States and won the tournament. Seven years later, Australia celebrated its lacrosse centennial, and the U.S. fielded an all-star team to compete in a similar international invitational tournament. It was here that the concept of holding a world championship tournament every four years was born. The U.S. has captured eight ILF World Championships and finished second in the ninth. The Americans have not lost a game in Championship play since the 1978 final, a 17-16 overtime setback to Canada. The winning streak spans 32 games through six ILF tournaments.

ILF World Championships History
 Year
Site
Champion
Runner-up
Championship Game Score
 1967*
Toronto, Canada
U.S.
Australia
n/a
 1974
Melbourne, Australia
U.S.
3-way tie
20-14
 1978
Stockport, England
Canada
U.S.
17-16 (OT)
 1982
Baltimore, Md. (U.S.)
U.S.
Australia
22-14
 1986
Toronto, Canada
U.S.
Canada
18-9
 1990
Perth, Australia
U.S.
Canada
19-15
 1994
Manchester, England
U.S.
Australia
21-7
 1998
Baltimore, Md. (U.S.)
U.S.
Canada
15-14 (OT)
 2002
Perth, Australia
U.S.
Canada
18-15
 * The 1967 team was the Mt. Washington Lacrosse Club from Baltimore, Md.