Iiro Rantala is a Finnish jazz pianist. He studied piano in the jazz department of Sibelius Academy and classical piano at the Manhattan School of Music. He is one of the best known Finnish jazz pianists, both in Finland and abroad. Rantala is a pianist and composer with Trio Töykeät, a Finnish jazz trio. In addition to jazz, he has composed some classical pieces, most notably the Concerto for Piano and Concerto in G♯ΔA♭.
In 2008, he released the album Elmo with his new formation, the Iiro Rantala New Trio. The members of the trio are Rantala, Marzi Nyman and Felix Zenger.
In 2017, Rantala was nominated for the Nordic Council Music Prize.