Ilarion (Jovan) Ruvarac (Serbian: Иларион Руварац; September 1, 1832 – August 8, 1905) was a Serbian historian and Orthodox priest, a member of the Serbian Academy of Sciences and Arts (first Serbian Learned Society and Serbian Royal Academy of Sciences). He was the founder and one of the foremost proponents of the critical school of Serbian historiography. He was archimandrite of Grgeteg monastery.