This is a list of sport leagues designated A1. The entries are sorted by sport and by countries.

Baseball

• A1 baseball league (Italy)
• Class A1 (baseball), a defunct classification within Minor League Baseball

Basketball

• A1 basketball league (Albania), the first professional league
• A1 basketball league (Bosnia and Herzegovina)
• A1 basketball league (Bulgaria), the second professional league
• A1 basketball league (Croatia)
• A1 basketball league (Greece)

Inline Hockey

• A1 inline hockey league (Italy), a league composed of eleven professional teams

Volleyball

• A1 volleyball league (Greece)
• A1 volleyball league (Italy)
• A1 volleyball league (Portugal)
• A1 women's volleyball league (Portugal)

Water polo

• A1 water polo league (Greece)

This disambiguation page lists articles associated with the title A1 sport league.
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