The 2020–21 Professional U18 Development League was the ninth season of the Professional Development League system. A total of 26 teams are split regionally into north and south leagues. Teams face their regional opponents both home and away before the top two face each other to determine the national champion. This results in 24 games played by both teams this season.
Burnley U18s,[1]Crystal Palace U18s[2] and Leeds United U18s[3] joined the U18 Premier League for the 2020–21 season after gaining category one status academies. Prior to the start of the season Swansea City left the league after downgrading their academy to category two.[4]
The 2020-21 Under-18 League 2, or Under-18s Professional Development League 2 as it is sometimes referred to, is the seventh campaign of post-EPPP Under-18 football's second tier, designed for those academies with Category 2 status. The league is split regionally into north and south divisions, with each team facing opponents in their own region twice both home and away and opponents in the other region once home OR away. This results in 25 games being played in the North Division, and South Division. The sides finishing in the top two positions in both regions at the end of the season will progress to a knockout stage to determine the overall league champion. Wigan Athletic U18s and Millwall U18s are the defending regional champions.
Swansea City U18s[4] dropped down to Category Two status in August 2020 and will join the South division this season.
The EFL Youth Alliance is run by the Football League under the auspices of the Football League Youth Alliance. 45 teams competed this season, 2 teams fewer than the previous season. Barnet U18s did not participate as they lost their EPPP license,[5] alongside Chesterfield U18s, and Hartlepool United U18s. For clubs that get relegated to the National League, they have two years to gain promotion back to the EFL. Otherwise, they lose their license with the League. Bolton Wanderers U18s would join the league this year as their academy was Category 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 and for this season only Merit League 3 as all three leagues would only contain 7 teams. Due to Covid, the Three Merit Leagues were regionalized for this season only.