Raleigh is the capital of the state of North Carolina and the seat of Wake County in the United States. It is the second-most populous city in North Carolina, after Charlotte, tenth-most populous city in the Southeast, 41st-most populous city in the U.S., and the largest city of the Research Triangle metro area. Raleigh is known as the "City of Oaks" for its many oak trees, which line the streets in the heart of the city. The city covers a land area of 147.6 square miles (382 km2). The U.S. Census Bureau counted the city's population as 474,069 in 2020. It is one of the fastest-growing cities in the country. The city of Raleigh is named after Walter Raleigh, who established the lost Roanoke Colony in present-day Dare County.