In this blog post, Steve Nix cites a United States Forest Service report suggesting that "there may be more than 865 different species of trees" in America. If you live in the U.S. and are at all curious about trees, then you perhaps have some idea of the 10 most common trees in your own region. But what about in terms of the whole country? Have I piqued your curiosity? Then have a look at this list of the 10 most common American trees from About's Forestry Guide.