City Directories, 1890 Census Substitute(includes directory of Winthrop 1886-88, 1892-93) Ancestry
Massachusetts City Directories(includes Winthrop 1886-8, 1892-3, 1902-4, 1916, 1918-9, and 1929) Ancestry

The history of Winthrop, Massachusetts : 1630-1952 Ancestry

More records for Winthrop are available on the statewide page