Washington is a state located in the Pacific Northwest region of the United States. It is the 18th largest state at 71,362 square miles and the 13th most populated with over 7.2 million residents. It is often referred to as Washington State to distinguish it from Washington D.C., which is typically shortened to Washington. About 60% of the residents live in the Seattle metropolitan area . It is also the leader of lumber producer, due to its abundance of Douglas fir, hemlock, ponderosa pine, white pine, spruce, larch and cedar trees