| Kato Makrinou | |
| Name Local: | Κάτω Μακρινού |
| Type: | community |
| Periph: | West Greece |
| Periphunit: | Aetolia-Acarnania |
| Municipality: | Agrinio |
| Population: | 401 |
| Population As Of: | 2021 |
| Coordinates: | 38.4833°N 58°W |
Kato Makrinou (Greek, Modern (1453-);: Κάτω Μακρινού meaning "Lower Makrinou") is a village in the municipal unit of Makryneia, Aetolia-Acarnania, Greece. It is located in a valley southeast of Lake Trichonida. It is 2 km northeast of Makrinou, 10 km southeast of Gavalou and 20 km northwest of Naupactus.
| Year | Population | |
|---|---|---|
| 1981 | 887 | |
| 1991 | 852 | |
| 2001 | 659 | |
| 2011 | 580 | |
| 2021 | 401 |