Ilirney (Russian: Илирней; Chukchi: Иԓирӈэй, Iḷirňèj, lit. mountain island) is a rural locality (a selo) in Bilibinsky District of Chukotka Autonomous Okrug, Russia, located southeast of Bilibino, on the banks of the Maly Anyuy River. The population of the village as of 2012 is 281, of which 247 are native Chukchi, a slight reduction on the most recent census data: 287 (2010 census); Municipally, Ilirney is subordinated to Bilibinsky Municipal District and is incorporated as Ilirney Rural Settlement.

Ilirney is situated 168 km from the district center Bilibino and 510 km from Anadyr. At the site of the village, the Maly Anyuy River is joined by the Nutsekyn tributary, from the Chukchi word, Nutech'yn, meaning "white fat", since there is a band of white clay that looks like fat and was occasionally consumed by the local inhabitants in times of famine. Lake Ilirney is found at the feet of Ilirney Range, about 20 km (12 mi) northeast of the village. Archeologists discovered neolithic camps on the shore of the lake and about 46 km (29 mi) further upstream is Lake Tytyl where archeologists have also discovered neolithic encampments and where the inhabitants of the village have a permanent fishing co-operative on the shores.

In 1945, a weather station was built on the shores of the Lower Ilirney lake, and not long after that a state farm specialising in reindeer herding was established, around which a settlement grew up. However, in 1954, the village was severely flooded and a decision was made to move the village 7 km upriver to prevent this from happening again. In the late 1950s there was a substantial expansion of the village, following the discovery of gold in the area and the subsequent mining developments to extract it. Additionally, the farm's name was changed to 40 Years of October (Russian: 40 лет Октября), and it became substantially more profitable as requirements from the expanding mining workforce increased demand significantly.

The population of the village as of January 2012 is 281 a reduction of 20 against the 2010 estimate of 301 (of which 247 were indigenous people), though this is higher than the official 2010 census result which recorded a population of 287, of whom 152 were male and 135 female. The 2010 estimate is the same as that made in 2005 as part of the environmental impact study by the Kupol gold project, which recorded a population of 233. In 2005 and 2012 the village was demographically organised thus:

Source: 2005 Data:
Source: 2012 Data:

The head of the rural settlement is Vladimir Kumlyu.

The main occupation of the inhabitants is reindeer herding and fishing and there is a central farm called "poplar" (Russian: Тополёвое) The village has a primary school, a kindergarten, a medical clinic, post office, communications center, a hotel with 20 beds, a cultural center, library, shop and bakery.

In the summer of 2009 on a small hill at the entrance to the village a large Orthodox cross was built and consecrated. An Orthodox chapel is also planned to be constructed.