Illiriia () is a village in Lutuhyne urban hromada, Luhansk Raion, Luhansk Oblast (region), Ukraine. The population of Illiriia is 646 people. Since 2014, the settlement has been occupied by Russian proxy forces.
The village was founded by Zaporizhzhian Cossacks in 1675. Being formerly located in the Lutuhyne Raion, the village was incorporated into the Luhansk Raion, after the Ukrainian parliament passed a legislation, which aimed at reducing the number of raions in 2020.
As of the 2001 Ukrainian census, Illiriia had a population of 646 inhabitants. The linguistic composition of the population was as follows: