Elderberries grow across the entire north American continent, in all 50 states I believe and through much of Canada. So while it is possible you can't grow where you are, generally just about everyone can grow some variety or cultivar of elder.
Out west, much depends on your location, elevation, rainfall, etc. If you are nothing too out of the ordinary, then it becomes just a matter of choosing varieties and cultivars to try, and asking around to see who or what already likes your area to grow!
Happily living in the valley of the dried frogs with a few tiny ads.
Heat your home with the twigs that naturally fall of the trees in your yard