Baltromiškė is a village in Jonava District Municipality, in Kaunas County, Lithuania. Baltromiškė lies at 67 m above sea level. It has 27 inhabitants. The nearest city is Jonava, 8.9 km to the west. Among the landmarks around are Ninth Fort (38 km), Open-Air Museum of Lithuania (28 km) and Jonava railway bridge (7.9 km).