Natchaug Elementary School is a public elementary school in Willimantic, Connecticut, United States. The school opened in 1865 and is located at the junction of Milk Street and Jackson Street in downtown Willimantic. It is one of four elementary schools in the Windham Public School system, and is accredited by the New England Association of Schools and Colleges. The name "Natchaug" comes from the Native American Nipmuc word meaning "land between the rivers."The school colors are bright green and blue.