This is a Message Board Post that is gatewayed to this mailing list. Classification: Query Message Board URL: http://boards.ancestry.com/mbexec/msg/an/JRB.2ACE/1634.2 Message Board Post: According to "Genealogical Resources in the New York Metropolitan Area," edited by Estelle M. Guzik, Bronx County was created in 1914. I do not know if the borough existed earlier---I'm not old enough. The Bronx County Clerk's Office has the Bronx portion of the New York State Census of 1915 and a map which is used to determine the Assembly District and Election District for a particular address. A Copy of the census is in Albany, NY at the New York State Library and microfilm copies are probably at other libraries. Reg Niles