Psilalonia (Greek: Ψηλαλώνια, literally "ψηλά αλώνια", meaning "high threshing floors") is a square and neighbourhood in the central part of the city of Patras, approximately 1 km away from the downtown city center. Psilalonia are confined by Gounaris Street and two other squares, 'Omonoia' and 'Wood Square'.
Psilalonia is one of the city's most visited and bustling places, with the homonymous square linking people from all ages and walks of life. It features palm trees, a playground, a fountain as well as a monument of Germanos III of Old Patras sculpted by Ioannis Kossos as well as a number of restaurants.
The area is densely populated with numerous blocks of flats in the narrow nearby roads. Supermarkets, pastry shops and bakeries can easily be found all over the neighbourhood. Its total area covers approximately 5 to 6 km² while the total street length is approximately 30 to 40 km of which 6 to 8 km are main streets and the rest are residential.