Didėja is a village in Rokiškis District Municipality, in Panevėžys County, Lithuania. Didėja lies at 132 m above sea level. The nearest city is Utena, 44 km to the south. Among the landmarks around are Lutheran church in Asare (30 km), Rokiškio krašto muziejus (7.9 km) and Church of St. Matthew the Apostle and Evangelist (8.1 km).