This is actually pretty interesting. Every source seems to say something different. Seems to depend on whether you look at it geopolitically or geographically. Some sources say Northwestern, which is more precise. You forgot south.
One source says:
Europe can be divided into seven regions based on geography, history, and culture. These regions are Nordic Countries, Eastern Europe, Central Europe, Southern Europe, Western Europe, British Isles, and the Baltics. Each region has its own unique characteristics and traditions.