The Award for Best Rap Song was first introduced at the Grammys in 2004. It is an award given to the writer(s) of the lyrics and music for the song. Kanye West is the most awarded artist in this category with 4 wins.

Winners: Grammys Best Rap Song

Jay-Z, Rihanna & Kanye West for Run This Town
Darius Harrison, Dwayne Carter, Jr., Stephen Garrett, James Schaffer and Rex Zamor for "Lollipop" performed by Lil Wayne & Static Major
DJ Toomp, Mike Dean, Faheem Najm, Kanye West, James Ingram & Quincy Jones for "Good Life" performed by Kanye West & T-Pain
Pharrell Williams and Ludacris for "Money Maker" performed by Ludacris & Pharrell
DeVon Harris and Jashandeep for "Diamonds from Sierra Leone" performed by Kanye West
Miri Ben-Ari, Che Smith (Rhymefest) and Kanye West for "Jesus Walks" performed by Kanye West
Jeff Bass, Eminem and Luis Resto for "Lose Yourself" performed by Eminem