The 2016 ATP World Tour was the global elite professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2016 tennis season. The 2016 ATP World Tour calendar comprised the Grand Slam tournaments (supervised by the International Tennis Federation (ITF)), the ATP World Tour Masters 1000s, the ATP World Tour 500 series, the ATP World Tour 250 series, the Davis Cup (organized by the ITF), and the ATP World Tour Finals. Also included in the 2016 calendar were the tennis events at the 2016 Summer Olympics and Hopman Cup, neither of which distributed ranking points.

This is the complete schedule of events on the 2016 calendar, with player progression documented from the quarterfinals stage.

These tables present the number of singles (S), doubles (D), and mixed doubles (X) titles won by each player and each nation during the season, within all the tournament categories of the 2016 ATP World Tour: the Grand Slam tournaments, the tennis event at the Rio Summer Olympics, the ATP World Tour Finals, the ATP World Tour Masters 1000, the ATP World Tour 500 series, and the ATP World Tour 250 series. The players/nations are sorted by:

The following players won their first main circuit title in singles, doubles, or mixed doubles:

The following players defended a main circuit title in singles, doubles, or mixed doubles:

The following players entered the top 10 for the first time in their careers:

These are the ATP rankings of the top 20 singles players, doubles players, and the top 10 doubles teams on the ATP Tour, at the current date of the 2016 season.

Following is a list of notable players (winners of a main tour title, and/or part of the ATP rankings top 100 (singles) or top 50 (doubles) for at least one week) who announced their retirement from professional tennis, became inactive (after not playing for more than 52 weeks), or were permanently banned from playing, during the 2016 season: