Demenika is a village/suburb in the municipality of Patras, Achaea, Greece. It lies south of the city centre, south of the river Glafkos. It is part of the community of Saravali within the municipal unit of Messatida. It is 2 km northeast of Ovrya and 4 km east of Paralia. The population was 2,385 in 2001. The Greek National Road 33 (Patras - Tripoli) passes through the village, and the new Greek National Road 9 (Patras - Pyrgos) passes south of the village.

Demenika is a village/suburb in the municipality of Patras, Achaea, Greece. It lies south of the city centre, south of the river Glafkos. It is part of the community of Saravali within the municipal unit of Messatida. It is 2 km northeast of Ovrya and 4 km east of Paralia. The population was 2,385 in 2001. The Greek National Road 33 (Patras - Tripoli) passes through the village, and the new Greek National Road 9 (Patras - Pyrgos) passes south of the village.