Igor Gennadyevich Mikhalkin (Russian: Игорь Геннадьевич Михалкин; born 31 May 1985) is a Russian professional boxer. He held the IBO light-heavyweight title from 2017 to 2018 and challenged once for the WBO light-heavyweight title in 2018. At regional level, he held the European light-heavyweight title between 2014 and 2016.

Mikhalkin made his professional debut in November 2007. On his 12th professional contest, he suffered a loss to Aleksy Kuziemski. In April 2014, Mikhalkin defeated Mohamed Belkacem by unanimous decision to claim the European light-heavyweight title.^[1] He made three successful defenses of that title, with the last coming against Patrick Bois in March 2016. During his tenure as European champion, Mikhalkin was highly ranked by the IBF.^[2][3]

Prior to his continental title defense against Bois, Mikhalkin tested positive and admitted to taking meldonium, a substance banned by WADA and was stripped by the EBU. He was also banned for two years by the EBU.^[4] The suspension was lifted in November of that same year.^[5]