"El Dorado" is the second track from English heavy metal band Iron Maiden's 2010 album The Final Frontier. The song is the band's forty-first single, and the only one from the album. It was made available as a free download on the band's official site at 00:01 on 8 June 2010 (UTC), one day before the album's supporting tour began. The cover art was created by Anthony Dry and is based on the covers of the EC Comics published by William Gaines that were popular in the 1950s. Regarding the early online release of the song, vocalist Bruce Dickinson explained, "El Dorado is a preview of the forthcoming studio album. As we will be including it in the set of our Final Frontier World Tour, we thought it would be great to thank all our fans and get them into The Final Frontier mood by giving them this song up front of the tour and album release."

Dickinson explained that the lyrics are a cynical critique of the financial crisis of 2007–08, comparing the bankers responsible with the people who sold the myth of El Dorado:

[El Dorado] has a cynical lyric about the economic crap that's been happening. It seemed a bit like a perfect storm; people were borrowing money like crazy. I thought, "This is really going to screw people up" and sure enough, we're all in deep doo-doo! And that's what El Dorado is about, it's about selling somebody the myth that "The streets are paved with gold" and them asking, "Where do I sign up?"

"El Dorado" won the Grammy Award for Best Metal Performance in 2011. It is the band's first win following two previous nominations ("Fear of the Dark" in 1994 and "The Wicker Man" in 2001).

The song's guitar solo, which lasts from about 3:42 to 4:23, is a trade-off divided into three parts; the first is played by Adrian Smith (3:42-3:53), the second by Dave Murray (3:53-4:06), and the third, which segues into the verse riff again, by Janick Gers (4:06-4:23).

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