| Mateikonys | |
| Settlement Type: | Village |
| Pushpin Map: | Lithuania |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location of Mateikonys |
| Coordinates: | 54.1889°N 25.0111°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Ethnographic region |
| Subdivision Name1: | Aukštaitija |
| Subdivision Type2: | County |
| Subdivision Name2: | Vilnius County |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Šalčininkai district municipality |
| Subdivision Type4: | Eldership |
| Subdivision Name4: | Eišiškės eldership |
| Population Total: | 160 |
| Population As Of: | 2011 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
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.
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.