1998 World Championships

• 1998 ATP Tour World Championships
• 1998 Aerobic Gymnastics World Championships
• 1998 FIBA World Championship for Women
• 1998 FIVB Men's World Championship
• 1998 FIVB Women's World Championship
• 1998 Ford World Women's Curling Championship
• 1998 IIHF World Championship
• 1998 Men's World Ice Hockey Championships
• 1998 Superbike World Championship
• 1998 UCI Road World Championships
• 1998 World Ice Hockey Championships (disambiguation)
• 1998 World Rhythmic Gymnastics Championships
• 1998 World Series
• 1998 World Weightlifting Championships
• Biathlon World Championships 1998
• FIBT World Championships 1998
• FIDE World Chess Championship 1998
• FIL World Luge Natural Track Championships 1998
• FIS Ski-Flying World Championships 1998