Final answer:
Corfu is an island located in the Ionian Sea and is part of Greece. It is situated on the northwestern coast of Greece and the southern coast of Albania.
Step-by-step explanation:
The country that has Corfu, an island in the Ionian Sea, off the northwestern coast of it and the southern coast of Albania, is Greece. Corfu is part of the Greek archipelago and has a rich history dating back to ancient times when it was part of the region known as Magna Graecia or "Greater Greece."
The island is not only a popular tourist destination with beautiful beaches and a verdant landscape, but it also bears historical significance due to its location at the crossroads of various cultural inflows from across the Mediterranean.