"Hoppípolla" ([ˈhɔʰpipʰɔtla], "Hopp í polla" is Icelandic for "Hopping into puddles") is a song by Icelandic band Sigur Rós from their 2005 album Takk.... It was released as the album's second single on 28 November 2005. The lyrics are mainly in Icelandic, with some nonsensical phrases, a "language" the band calls Vonlenska ("Hopelandic"). Written with spaces, the song's title would be "Hoppa í polla" (the "—a" in "hoppa" is not pronounced). As with many of the band's songs, it was given a nickname in the early stages of writing. "Hoppípolla" was "The Money Song", as the band was certain they had written a song which would have commercial success. It is the band's most successful single, charting at #24 on the UK Singles Chart in May 2006. It is considered the most well known song within its genre. The single also features "Með blóðnasir", an instrumental coda to "Hoppípolla", which is also featured on Takk...; and a studio remake of "Hafssól", a song previously released on the band's 1997 debut album, Von. The title appears as "Hafsól" on the single.

A promotional music video for "Hoppípolla," directed by Arni & Kinski, was filmed in November of 2005. It depicts two groups of elderly friends strolling around the suburbs of Reykjavík and acting like children; pulling pranks on people and battling with water balloons and wooden swords near a cemetery. When one old man is injured and suffers a nosebleed (as referenced in the lyrics), the opponents run away in fear, while the others celebrate their victory. The video shows several shots of the friends "hopping in puddles" of water along a path.

The band members are featured in the video: keyboardist Kjartan Sveinsson plays the victim of a Knock, Knock, Ginger trick, guitarist and vocalist Jón Þór Birgisson plays the cashier at a shop where an old man steals and eats some pears, drummer Orri Páll Dýrason can be seen repairing his bicycle, and bassist Georg Hólm can be seen cleaning.

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