Portland is the most populous city in the U.S. state of Maine, with a population of 67,067 as of 2017. The Greater Portland metropolitan area is home to over half a million people, more than one-third of Maine's total population. Portland's economy is heavily dependent on tourism and the Old Port district is a popular destination. The Port of Portland is the largest tonnage seaport in New England. The city seal depicts a phoenix rising from ashes, which is a reference to the recoveries from four devastating fires. Portland was named after the English Isle of Portland, Dorset. The city of Portland, Oregon was named after Portland, Maine.