Andrey Nikolayevich Illarionov (Russian: Андре́й Никола́евич Илларио́нов, born 16 September 1961) is a Russian economist and former senior policy advisor to Vladimir Putin, the President of Russia, from April 2000 to December 2005. Since April 2021, he is a senior fellow at the non-governmental organization Center for Security Policy, which is based out of Washington, D.C. in the United States.