Mikko Aarni (born 31 May 1981) is a Finnish former bandy forward.
Aarni was brought up by Tornio PV and moved to Kalix Bandy in 2004. In 2006, he joined Sandvikens AIK.
Aarni was part of the gold-winning Finnish national bandy team at the Bandy World Championship 2004, which was held in Sweden and Hungary.