The document provides an overview of the Northeast region of the United States, dividing it into New England and Middle Atlantic states. It describes the states that make up each subregion and their physical geography, climate, and economy. A key point is that the Northeast has the highest population density and urbanization in the country, with many cities founded as colonial ports that later grew into centers of industry and finance, forming a megalopolis from Boston to Washington D.C. The economies of New England and the Middle Atlantic states revolve around services, education, manufacturing, agriculture, fishing, and resource extraction industries like coal mining that developed from the region's physical environment and history.