Iiro Aalto (born 19 July 1977) is a Finnish former footballer who played as a left-back.
He started his career with Finnish football club Pallo-Iirot, then moved to FC Haka and spent most of his career at Helsingin Jalkapalloklubi but from December 2007 played for Cypriot club Olympiakos Nicosia. He started his career in Pallo-Iirot.
Aalto returned to Finland in May 2008 to play for Tampere United. After his loan spell at Tampere he moved to TPS Turku.
His brother Jussi is also a former footballer.