Ivaylo Ilarionov (Bulgarian Cyrillic: Ивайло Иларионов; born 6 January 1973) is a retired Bulgarian association football forward and midfielder who played professionally in Bulgaria, Austria and the United States.
Ilarionov began his career with PFC CSKA Sofia in Bulgaria.
In 1995, he came to the United States for the summer, playing for the Chattanooga Railroaders in the 1995 USISL Professional League.
During the 1997-1998, he is only shown as playing three games for SV Gerasdorf.
In 1998, Ilarionov moved permanently to the United States, signing with the Nashville Metros in the USISL A-League.