The ATP Challenger Tour, in 2018, was the secondary professional tennis circuit organized by the ATP.

The 2018 ATP Challenger Tour calendar comprised 159 tournaments, with prize money ranging from $50,000 up to $150,000.

This was the complete schedule of events on the 2018 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: 1) total number of titles (a doubles title won by two players representing the same nation counts as only one win for the nation); 2) a singles > doubles hierarchy; 3) alphabetical order (by family names for players).