Sweden participated in the Eurovision Song Contest 2015 with the song "Heroes", written by Linnea Deb, Joy Deb and Anton Malmberg Hård af Segerstad. The song was performed by Måns Zelmerlöw. Swedish broadcaster Sveriges Television (SVT) organised the national final Melodifestivalen 2015 in order to select the Swedish entry for the 2015 contest in Vienna, Austria. After twenty-eight songs competed in a six-week long process consisting of four semi-finals, a second chance round and a final, "Heroes" performed by Måns Zelmerlöw emerged as the winner after gaining the most points from both an international jury and a public televote.

In the second of the Eurovision semi-finals "Heroes" placed first out of the 17 participating countries, securing its place among the 27 other songs in the final. In Sweden's fifty-fifth Eurovision appearance on 23 May, "Heroes" became the sixty-third song to win the Eurovision Song Contest, receiving a total of 365 points and full marks from twelve countries. This was Sweden's sixth win in the contest, having previously won in 1974, 1984, 1991, 1999 and 2012.

Prior to the 2015 Contest, Sweden had participated in the Eurovision Song Contest fifty-four times since its first entry in 1958. Sweden had won the contest on five occasions: in 1974 with the song "Waterloo" performed by ABBA, in 1984 with the song "Diggi-Loo Diggi-Ley" performed by Herreys, in 1991 with the song "Fångad av en stormvind" performed by Carola, in 1999 with the song "Take Me to Your Heaven" performed by Charlotte Nilsson, and in 2012 with the song "Euphoria" performed by Loreen. Following the introduction of semi-finals for the 2004, Sweden had, to this point, only failed to qualify to the final on one occasion in 2010. In 2014, Sweden placed third in the contest with the song "Undo" performed by Sanna Nielsen.

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