The Forgotten Realms Player's Guide is a supplement to the 4th edition of the Dungeons & Dragons role-playing game.

The book features art by Matt Cavotta, Miguel Coimbra, Brian "Chippy" Dugan, Jesper Ejsing, Wayne England, Lucio Giordani, Soe Hemmi, Goran Josic, Rob Lazzaretti, Howard Lyon, Warren Mahy, Breanne Miller, William O'Connor, Ryan Sansaver, Mike Sass, Mike Schley, Emi Tanji, Francis Tsai, and Eva Widermann.

Shannon Appelcline commented that with Fourth Edition Dungeons & Dragons, Wizards of the Coast intended to publish only three books for each campaign setting, and after that move on to a new setting the following year: "The Forgotten Realms Campaign Guide (2008), the Forgotten Realms Player's Guide (2008) and FR1: Scepter Tower of Spellgard (2008) kicked off the cycle... and were some of Wizards' worst-received supplements ever.

This was largely because Wizards had decided to destroy the old Forgotten Realms to make it fit into their ideas of a 'points of light' setting.

From the scathing reviews that the new setting books got, it seems likely that they did as much to alienate existing fans from fourth-edition play as the core rulebooks had.