Igors Šiškins (born 9 June 1959 in Rēzekne) is a Latvian ultranationalist activist and politician.

During the 1990s, Šiškins was a member of the Latvian ultranationalist organization Pērkonkrusts, where he was one of the members convicted for their involvement in bombing the Monument to the Liberators of Soviet Latvia and Riga from the German Fascist Invaders in June 1997.

In 2007, he founded the Gustavs Celmiņš Centre (GCC) as a continuation to the banned Pērkonkrusts.

[9][10] In 2015, on the Remembrance Day of the Latvian Legionnaires, Šiškins organized a separate procession attended by around 20 people.

[7] He is also believed to be one of the leaders of the anti-immigration "Stop Migration" fund and the radical right Antiglobalists Society that have attempted to establish a political party together.