San Marino participated in the Eurovision Song Contest 2015 with the song "Chain of Lights", written by Ralph Siegel and John O'Flynn. The song was performed by Anita Simoncini and Michele Perniola. The Sammarinese broadcaster SMtv San Marino (SMRTV) announced in November 2014 that it had internally selected their former Junior Eurovision Song Contest entrants Anita Simoncini and Michele Perniola to represent the nation at the 2015 contest in Vienna, Austria. Their song "Chain of Lights" was presented to the public later in March 2015. In the second of the Eurovision semi-finals, San Marino failed to qualify to the final, placing sixteenth out of the 17 participating countries with 11 points.

Prior to the 2015 Contest, San Marino had participated in the Eurovision Song Contest five times since its first entry in 2008. Their debut entry in 2008, "Complice" performed by Miodio, failed to qualify to the final and placed last in the semi-final it competed in. San Marino subsequently withdrew from the contest in 2009 and 2010, returning in 2011 with Italian singer Senit performing "Stand By", which also failed to take the nation to the final. Between 2012 and 2014, San Marino sent Valentina Monetta to the contest on three consecutive occasions, which made her the first singer to participate in three consecutive contests since Udo Jürgens, who competed in 1964, 1965 and 1966 for Austria. Her entries in 2012 ("The Social Network Song") and 2013 ("Crisalide (Vola)") also failed to qualify San Marino to the final. However, in 2014, Monetta managed to bring San Marino to the final for the first time where she placed 24th with the song "Maybe".

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