The Folklore Museum of Kastoria (Greek: Λαογραφικό Μουσείο Καστοριάς) also known as Folklore Museum “Nerantzis-Aivazis” (Λαογραφικό Μουσείο “Νεράντζη–Αϊβάζη”), located in Kastoria, Macedonia, Greece, is housed in one of the city's oldest mansions, the Nerantzis-Aivazis residence near the lake, at 10 Kapetan Lazou Street.

The two-storey premises were built between the 16th and 17th centuries, and survived in such good condition that the museum was able to open without restoration.

On the second floor are two bedrooms (one for husband and wife and the other for the children) and two sitting-rooms, one small and the other large (the main reception room, used on festivals and holidays).

It contains a suite of furniture (with traditional places for the hosts, the metropolitan bishop and Turkish dignitaries); in the alcove are low tables for other guests.

Above the bedrooms is a balcony, from which unmarried women could observe ceremonies and celebrations in the house.