Union Square is a neighborhood of Somerville, Massachusetts, located around the intersection of Washington Street and Somerville Avenue, about half a mile from Inman Square in neighboring Cambridge. The name "Union Square" comes from the square having been used as a recruitment and mustering site for the Union Army in the American Civil War. A plaque commemorating the mustering site sits at the southwest corner of the square between Somerville Avenue and Washington Street. Union Square is now the commercial center of a primarily residential neighborhood with many restaurants, bars and neighborhood stores.