The 2015–16 Professional U18 Development League was the fourth season of the Professional Development League system.
The league was split into two regional divisions – north and south.
The winning team of Group 1 in the second league stage was the overall champion and qualified for the UEFA Youth League in the 2016–17 season.
At the end of the season, the teams finishing in the top two positions of both divisions will meet in the knockout stage to determine the overall league champion.
[3] The teams in the Southeast and Southwest Divisions played another ten games to determine the champions of Merit League One and Merit League Two.