| Agios Dimitrios | |
| Name Local: | Άγιος Δημήτριος |
| Type: | community |
| Coordinates: | 39.911°N 25.151°W |
| Periph: | North Aegean |
| Periphunit: | Lemnos |
| Municipality: | Lemnos |
| Municunit: | Atsiki |
| Population As Of: | 2021 |
| Population: | 736 |
Agios Dimitrios (Greek, Modern (1453-);: Άγιος Δημήτριος) is a settlement on the Greek island of Lemnos. Its population is 736 (2021).
In the military sandbox video game Arma 3, the village is depicted as the fictional village of Agios Dionysios, along with the rest of Lemnos as the fictional nation of Altis.