Sampo Haapamäki (born 3 February 1979, Finland) is a Finnish composer. He has won several international composition competitions.
Haapamäki studied at the Sibelius Academy in Helsinki with Tapio Nevanlinna and Veli-Matti Puumala. He has also studied with Claus-Steffen Mahnkopf in Leipzig, Germany and with Tristan Murail at Columbia University.
Haapamäki has embraced a quarter-tone based language during the last few years. Some of his most notable compositions written in this style are: "Velinikka" (2008), for quarter-tone accordion and 18 musicians. "Kirjo" (2006), for bass-clarinet and 26 musicians. "Design" (2005), for 16 musicians. "Fresh" (2004, 2007), for 15 musicians. "Maailmamaa" (2010) for mixed choir and tape
2003 Finalist at the Queen Elisabeth Composition Competition 2004 Gaudeamus International Composers Award 2005 ISCM-CASH Young Composer Award 2006 Teosto Prize (in Finnish)