Marijo Šivolija-Jelica (born 29 June 1981 in Omišalj) is a Croatian amateur boxer and two-time Olympian best known to medal repeatedly in international competition at light heavyweight.

He also manages heavyweight boxer Mark de Mori.

In 2005 he won a silver medal at the World Championships where he beat Armenian Artak Malumyan 20:10 in the semis but was defeated in the final by Kazakh Yerdos Dzhanabergenov 12:27.

In 2007 at the World Championships he lost to eventual winner Abbos Atoev in the quarterfinals 6:17.

He has since become the manager of heavyweight boxer Mark de Mori.