Greece participated in the Eurovision Song Contest 2015 in Vienna, Austria. Maria Elena Kyriakou was chosen to represent Greece in the 2015 contest with the song "One Last Breath".

Prior to the 2015 contest, Greece had participated in the Eurovision Song Contest thirty-six times since its first entry in 1974, winning it in 2005 with the song "My Number One" performed by Elena Paparizou, and having placed third three times: in 2001 with the song "Die for You" performed by the duo Antique; in 2004 with "Shake It" performed by Sakis Rouvas; and in 2008 with "Secret Combination" performed by Kalomoira. Following the introduction of semi-finals for the 2004 contest, Greece has had a top ten placing every year except 2012 and 2014. Its least successful result was in 1998 when it placed twentieth with the song "Mia Krifi Evesthisia" by Thalassa, receiving only twelve points in total, all from Cyprus and in 2014 with the song "Rise Up" by Freaky Fortune feat. RiskyKidd, with 35 points, but this time Cyprus was out of the contest.

The Greek national broadcaster, Hellenic Broadcasting Corporation (ERT), was in charge of Greece's participation each year, including the selection process for its entry. Although its selection techniques have varied over the decades, the most common has been a national final in which various acts compete against each other with pre-selected songs, voted on by a jury, televoters, or both. In most cases, internal selections have been reserved for high-profile acts, with the song either being selected internally or with multiple songs—by one or multiple composers—performed by the artist during a televised final. One of the more unusual methods was a reality television talent competition format inspired by the Idol series that ran for many months in 2004, ultimately being scrapped. The notability of the participants has also varied, from previously unsigned acts to established music superstars. Since the 2010s, ERT has used national finals with generally less-established acts.

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