Isak Ocke Danielson (born 27 August 1997), known professionally as Isak Danielson, is a Swedish singer and songwriter.

From 2008 to 2010, Danielson and his family lived in London, where he attended Tring Park School for the Performing Arts and was trained in theatre and singing. Danielson rose to prominence in Sweden in 2012 when he successfully auditioned for The X Factor Sweden, finishing in third place.

His music career commenced with the release of “Long Live This Love” in January 2014, a track previously uploaded to his YouTube channel in December 2013. His debut EP, Volume One, came out on March 26, 2015, followed by Volume Two in October 2016.

Internationally, Danielson gained recognition when “Ending,” a track from his debut EP, was featured in a choreography video by Maddie Ziegler. In September 2017, the song appeared on So You Think You Can Dance and in the TV series Cloak & Dagger.

On October 19, 2018, Isak Danielson launched his debut studio album, Yours, which peaked at number 27 on the Swedish charts. This was followed by the third EP, Run To You, released on March 29, 2021. In 2019, Danielson signed with Universal Music Group, releasing “Silence,” his first track on the new IOD label. His third studio album, Remember to Remember Me, was released in April 2020. On March 5, 2021, Danielson released Tomorrow Never Came, followed by the EP Live in Stockholm in July 2021.

His fourth studio album, King of a Tragedy, was released on April 8, 2022. A deluxe edition of the album was released on June 10, 2022.