New Super Mario Bros. Wii Level Count: 60 Main, 68 Total

Total Main Levels: 60 (excluding Toad Houses, Enemy Courses, and Mushroom Houses).

Breakdown by World

Additional Content

• Toad Houses: 24 (Red/Green/Yellow) for power-ups/lives.
• Enemy Courses: 7 (1 per World 1-7) for 1-Ups.
• Mushroom Houses: 7 (1 per World 1-7) for item storage.
• Airship Battles: 1 per World (Boss fight).
• Castle Battles: 1 per World (Mid-boss) + Final Castle.

Grand Total Playable Stages (incl. World 9): 68. The commonly cited "60" refers to the main 8 worlds required for credits.