Runionys is a village in Molėtai District Municipality, in Utena County, Lithuania. Runionys lies at 135 m above sea level. It has 46 inhabitants (2021). The nearest city is Utena, 24 km to the northeast. Among the landmarks around are Molėtai Astronomical Observatory (16.7 km), Synagogue of Alanta (1.9 km) and Voruta (23 km).