On March 1, 1860, the eastern border between Queens County (later Nassau County) and Suffolk County was redefined with no discernible change. On June 8, 1881, North Brother Island was transferred to New York County. On May 8, 1884, Rikers Island was transferred to New York County.
On March 1 1860 the eastern border between Queens County (later Nassau County) and Suffolk County was redefined with no discernible change On June 8 1881 North Brother Island was transferred to New York County On May 8 1884 Rikers Island was transferred to New York County