| Official Name: | Novoilyinsk |
| Native Name: | Новоильинск |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Name3: | Zaigrayevsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 51.6667°N 150°W[1] |
Novoilyinsk (Russian: Новоильинск) is a rural locality (a selo) in Zaigrayevsky District, Republic of Buryatia, Russia. The population was 4,700 as of 2010.[2] There are 36 streets.
Novoilyinsk is located 40 km southeast of Zaigrayevo (the district's administrative centre) by road. Tashelan is the nearest rural locality.[3]