"Everything I've Known" is a song written and recorded by American nu metal band Korn for their sixth studio album, Take a Look in the Mirror. It was released as the album's fourth and final single in April 2004.

"That's about when you're fighting with your girlfriend, and how when you've been together for so long, things can just get shitty." – Jonathan Davis

The meaning of the song was further explained as somewhat of an emotional reaction to what is believed to be the decline of the music industry.

No official video was filmed for the song, although an animated video by Gregory Ecklund received moderate airplay on MTV2's Headbangers Ball.