Important addresses for research in Warren County: .Warren County 320 E. Silver Street Lebanon, Ohio 45036-2361 (513) 932-4040 Birth: 1867 Death: 1867 Marriage: 1803 Probate: 1803 .Warren County Chapter Ohio Genealogical Society 300 East Silver Street Lebanon, Ohio 45036 (513) 932-1144 .Warren County Historical Society 105 S. Broadway P. O. Box 223 Lebanon, Ohio 45036 (513) 932-1817