Lazaretto Island, (Greek: Λαζαρέτο, also Lazareto, formerly known as Aghios Dimitrios) is located two nautical miles northeast of Corfu. The island has an area of 17.5 acres (71,000 m2) and is administered by the Greek National Tourist Organization. It gets its name from the lazaretto located there.
During Venetian rule in the early 16th century a monastery was built on the islet and a leprosarium was established there later that century, after which the island was named.
In 1798, during the French occupation, it was occupied by the Russo-Turkish fleet which ran it as a military hospital. During the British occupation, in 1814, the leprosarium was again opened after renovations. After Enosis in 1864 the leprosarium saw occasional use.