The Norway Spruce is found all over the world today, but was originally found predominantly in Northern Europe.  Today it is found all across the United States and other parts of the world ranging from large, dense forests, to being found in the backyards of homs.  The reason it is found in so many places is because it can grow in many adverse soil conditions and is able to establish itself quickly.  It is most commonly found in northern, cool areas, but has also become a popular specimen used in landscaping because it is easily transplanted.  Its niche in its natural habitat is to act as a photosynthetic plant and provide shelter for other animals and critters to live in.

W.D. Brush @ USDA-NRCS PLANTS Database