High Quality Content by WIKIPEDIA articles! Boston Light is a lighthouse located on Little Brewster Island in outer Boston Harbor, Massachusetts. The first lighthouse to be built on the site dates back to 1716, and was the first lighthouse to be built in what is now the United States. The current lighthouse dates from 1783, is the second oldest working lighthouse in the US (after Sandy Hook Lighthouse in New Jersey), and is the only lighthouse to still be actively staffed by the United States Coast Guard. The structure was designated a National Historic Landmark in 1964.