2015 Formula One World Championship — 66th season of Formula One motor racing

2015 Copa América — 2015 edition of the Copa América association football competition

2015 FIFA Women's World Cup — 2015 edition of the FIFA Women's World Cup

January 2015 — month of 2015

2015 AFC Asian Cup — international football competition

2015 World Championships in Athletics — 2015 edition of the World Championships in Athletics

2015 European Games — sport competition

2015 Africa Cup of Nations — football championship of Africa

2015–16 UEFA Europa League — 45th season of Europe's secondary club football tournament organised by UEFA

2015 UEFA Super Cup — 40th UEFA Super Cup in 2015

2015 CONCACAF Gold Cup — 2015 edition of the association football competition CONCACAF Gold Cup