Mateikonys is a village in the Šalčininkai district municipality, Lithuania near the border with Belarus.

According to the 2011 census it had population of 160.

[1] From 1923 to 1939 the village was located in Wilno Voivodeship, north-east Second Polish Republic.

After the Nazi German and Soviet invasions of Poland in September 1939 the village was transferred to Lithuania according to the Soviet–Lithuanian Mutual Assistance Treaty.