Palaio Loutro (Greek: Παλαιό Λουτρό) is a small mountain village in Messenia, Peloponnese, Southern Greece.

It is located a few kilometres from Chora, the site of Nestor's Palace, and the seaside port of Pylos.

It suffered immensely from the occupation of Greece between 1941 and 1944; residents fled Nazi forces and sought refuge in the nearby mountains when Palaio Loutro was set alight to avenge the death of German troops in the area as a result of battles with the Greek Resistance.

In recent years, former residents of the village and their descendants have begun rebuilding their ancestral homes which are used in the summer months.

The latter was carved out of the mountain facing the village and many residents sought refuge there when Palaio Loutro was set alight by the Nazis in World War II.