Russell Effaney Kun (born 24 May 1966) is a political figure from the Pacific nation of Nauru[1] and former powerlifter.

Kun was Justice Minister in the Ludwig Scotty government from June to August 2003 and returned to that post under René Harris in February 2004.

In September 2004 Kun became controversial after stating that Health Minister Kieren Keke was ineligible to serve.

From 17 July 2005, Kun subsequently worked in the Public Defender's office in Majuro, Marshall Islands, along with Lionel Aingimea, the former legal officer of Nauru.

From 19 April 2007, he was the Chief Public Defender of Marshall Islands and is still at this post.