Oslo Ess is a Norwegian rock/punk band from Oslo with Åsmund Lande as vocalist/guitarist, Peter Larsson on guitar, Knut-Oscar Nymo on bass and Einar Stenseng on keyboards. Lande and Larsson used to play in another formation and launched the band. Although Oslo Ess doesn't have a permanent drummer, a number of drummers have played with the band including Steffen Skau Linnert, Tommy Akerholdt, Kim Akerholdt and Mads Golden.

The band released their debut album Uleste bøker og utgåtte sko on Råtass Records on 11 March 2011. The album reached #9 on Norwegian Albums Chart. This was followed up in 2012 with a new album Verden på nakken, venner i ryggen that hit #4 on the Albums chart in its first week of release. Their most successful single has been "Caroline". The band's lyrics are mostly about partying and nightlife, reflecting partly Jokke og Raga Rockers, but in a contemporary style of the 2010s.
Oslo Ess were nominated for "best rock group" category in 2011. They also performed to a sold-out crowd on 21 December 2011 and 6th of October in the Rockefeller.
After a live album in 2013, Oslo Ess released their third album "Alle Hjerter Deler Seg".