"Numb/Encore" is a song by American rapper Jay-Z and rock band Linkin Park from their EP Collision Course (2004). It was released as a single on December 13, 2004, by Warner Bros., Machine Shop, Def Jam, and Roc-A-Fella Records. The song is a mash-up that fuses rock and hip hop, combining lyrics from "Numb" by Linkin Park and "Encore" by Jay-Z, both released in 2003.

The only single released from the EP, the track went on to reach number 20 on the Billboard Hot 100. Billboard also placed the single at number 93 on their Billboard Year-End Hot 100 singles of 2005 chart. Outside the United States, the single peaked at number 14 in the United Kingdom, number five in France and the Netherlands and spent three weeks at number one in Ireland.

In June 2024, "Numb/Encore" became the third song by both artists to surpass 1 billion streams on Spotify.