In 1867, the South Side Rail Road began operating with a station in Baldwinsville. In 1870, one of Thomas Baldwin's sons, Francis Baldwin, became a member of the New York State Assembly representing Queens County's 2nd District; he later served as the Queens County treasurer. (During this time, Baldwinsville was part of Queens County.) A year later, the name of the village was changed from Baldwinsville to Baldwins by the U.S. Postal Service so as to not confuse it with the village of Baldwinsville in upstate New York. By 1892, by an act of local government, the village was officially named Baldwin.