Ilarion Roganović (Serbian Cyrillic: Иларион Рогановић; 12 July 1828 – 15 January 1882) was the Metropolitan of Montenegro and the Highlands from 1860 to 1882.

His family was poor,[2] and he was taught by a local priest, Aleksije Radičević, and hieromonk Isaija Bajković who ordained him as a monk at Vranjina Monastery.

[4] From Ostrog, he moved to Cetinje Monastery where he became archimandrite, meaning he was de facto named successor to the Metropolitan.

Ilarion also introduced registers of births, deaths and marriages, expanding the earlier practice of recording only baptisms, started by Peter I.

It covered the areas conquered by Montenegro in the Montenegrin–Ottoman War of 1878 and was led by Visarion Ljubiša, who Ilarion and the Bishop of the Bay of Kotor Gerasim Petranović consecrated on 8 September 1878.