1) Iberian Peninsula:
- Countries: Portugal, Spain, Andorra, and Gibraltar (British overseas territory)
2) Italian Peninsula:
- Countries: Italy, San Marino, and Vatican City
3) Balkan Peninsula:
- Countries: Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Greece, Kosovo, Montenegro, North Macedonia, Romania, Serbia, Slovenia, and Turkey (part of Thrace only)
4) Scandinavian Peninsula:
- Countries: Norway, Sweden, and Finland (part of Lapland only)
5) Jutland Peninsula:
- Countries: Denmark, Germany (part of Schleswig-Holstein only), and a small part of Poland (part of Pomerania only).