The 2018 Premier Development League season was the 24th season of the PDL, and the last under the PDL name. The regular season started on May 4 and ended on July 16. There were a total of 74 teams playing across 11 divisions with the addition of the Deep South division. Calgary Foothills FC won the final championship under the PDL branding, having defeated Reading United AC 4–2 in extra time in the Championship game on August 4, 2018.

A total of 12 new member clubs join the PDL for the 2018 season.

Bold = winner
* = after extra time, ( ) = penalty shootout score

The PDL Conference Championships were held over the weekend of July 20–21. Matches were played at: Whittier, CA (Western Conference, host FC Golden State Force); Reading, PA (Eastern Conference, host Reading United AC); Des Moines, IA (Central Conference, host Des Moines Menace); and Statesboro, GA (Southern Conference, host South Georgia Tormenta FC). The four conference champions advanced to the PDL semifinals.

F: Ifunanyachi Achara (BLR), Khori Bennett (REA), Charlie Ledula (LIR)
M: Jakov Bašić (BOS), Ricardo Gomez (MYB), Aaron Molloy (REA) *, Brian Saramago (NYR)
D: Prosper Figbe (BLR), Kamal Miller (REA), Kevin O'Toole (NYR)
G: Bennet Strutz (REA)

F: Austin Ricci (MIB), Kinoshita Ryosuke (DMM) *, Tucker Stephenson (KAW)
M: Kyle Carr (LNU), Brad Dunwell (MIB), Luka Prpa (CHI) *, Tate Robertson (DAY) *
D: Ebenezer Ackon (LNU), Mark Lindstrom (CIN), Grant Stoneman (CHI)
G: Carlos Mercado (DMM)

F: Brandon Guhl (BVC), Juan Tejada (LAK), Marek Weber (SCU) *
M: David Graydon (SIM), Marco Micaletto (SGT) *, Leonardo Paiva (VIL), Toni Soler (SGT)
D: Mathieu Laurent (BIR), Jordan Skelton (MIS) *, Gabriel Torres (VIL) *
G: Pablo Jara (SGT)

F: Moses Danto (CGY) *, Santiago Patino (SEA), Samuel Villava (GSF)
M: Elijah Adekugbe (CGY), Nico Pasquotti (CGY), Matteo Polisi (TSS), Willy Spurr (LAN)
D: Henry Lander (TUC), Callum Montgomery (VIC) *, Dominick Zator (CGY)
G: Marco Carducci (CGY) *