The 2016 Davis Cup was the 105th edition of the Davis Cup, a tournament between national teams in men's tennis. It was sponsored by BNP Paribas. From this season's tournament the deciding set of each match would be settled by a tiebreak at 6 games all rather than playing an advantage set until a player or a team were two games clear. Argentina won their first Davis Cup title, after 4 runner-up finishes, defeating Croatia in the final. Federico Delbonis defeated Ivo Karlović in the final match to give Argentina its first Davis Cup title, after a comeback from Juan Martín del Potro against Marin Čilić in the fourth match.

The Davis Cup is the premier international team event in men's tennis. It is run by the International Tennis Federation (ITF) and is contested annually between teams from over 150 competiting countries, making it the world's largest annual team sporting competition. It is described by the organisers as the "World Cup of Tennis", and the winners are referred to as the World Champions. The competition began in 1900 as a challenge between Great Britain and the United States. By 2023, 155 nations entered teams into the competition.