| Koiliomenos | |
| Name Local: | Κοιλιωμένος |
| Type: | community |
| Coordinates: | 37.7483°N 20.7736°W |
| Periph: | Ionian Islands |
| Periphunit: | Zakynthos |
| Municipality: | Zakynthos |
| Municunit: | Artemisia |
| Population As Of: | 2021 |
| Population: | 333 |
Koiliomenos (Greek, Modern (1453-);: Κοιλιωμένος, also known as Agios Nikolaos) is a settlement on Zakynthos island, Greece. It is located 3 kilometers southwest of Machairado and 11 kilometers southwest of Zakynthos City. In 2021, the population of Koiliomenos was 333 inhabitants.