Which southern European country is the sole occupant of one peninsula?

The southern European country that occupies a whole peninsula is Portugal. Portugal is located on the Iberian Peninsula, which borders Spain to the east and north and the Atlantic Ocean to the south and west. The peninsula is about 583,254 km2 (225,200 sq mi) in size and has a population of about 53 million people. Portugal is the westernmost country in mainland Europe and has a long history and culture.