The ATP Challenger Tour, in 2015 was the secondary professional tennis circuit organized by the ATP.

The 2015 ATP Challenger Tour calendar comprised 166 tournaments, with prize money ranging from $40,000 up to $220,000.

This is the complete schedule of events on the 2015 calendar, with player progression documented from the quarterfinals stage.

These tables present the number of singles (S) and doubles (D) titles won by each player and each nation during the season.

The players/nations are sorted by: Points are awarded as follows: