Yes. The Peloponnese Peninsula is in Greece, which is a country in Europe.
In the Scandinavian Peninsula in northern Europe.
asia
Denmark occupies the Jutland peninsula by itself. It is the European country furthest west that occupies a peninsula alone. However, I would term it a country in northern Europe as opposed to western Europe. If Europe was split into just northern and southern, there would be two answers; Italy and Denmark.
Spain is on the Iberian Peninsula in southwest Europe.
What is the westernmost peninsula in Europe?
Macedonia
No, it is completely landlocked. Switerzerland is is a country in Europe.
Europe
The country on the Iberian Peninsula of Europe is spelled "Portugal".
Portugal is a sovereign country in South West Europe in Iberian peninsula. It is the western most country of Europe.
No, Norway is not a peninsula, but some parts of the country are. Fosen, Lindesnes, Lista, Romsdalshalvøya, Nordkinnhalvøya and Varangerhalvøya are peninsulas there are parts of the Norwegian country. Peninsula = halvøy in Norwegian