The Downer Rowhouses are two sets of Second Empire row houses that are back to back at 55 Adams Street and 192-200 Central Street, Somerville, Massachusetts. Built c. 1880, they are among the first buildings of their type built in the city. The two groups were separately listed on the National Register of Historic Places on September 18, 1989 as Downer Rowhouses (Central Street) and Downer Rowhouses (Adams Street).