The 2013 USL Premier Development League season was the 19th season of the PDL. The regular season began on May 4 with 3 matches and ended on July 21 with 9 matches. The regular season was followed by a postseason tournament of conference winners to determine the league's champion. Four teams were added to the league and 13 teams dropped, bringing the total number of teams in the league to 64 for 2013.