Bartoniai is a village in Jonava District Municipality, in Kaunas County, Lithuania. Bartoniai lies at 33 m above sea level. It has 204 inhabitants (2021). The nearest city is Jonava, 6.9 km to the east. Among the landmarks around are Ninth Fort (23 km), M. K. Čiurlionis National Art Museum (24 km) and Pažaislis Monastery (22 km).