| Line 1: Bride's Name, Age and Residence | |
| Line 2: Groom's Name, Age and Residence | |
| Line 3: Marriage Date and Place; Person perfoming marriage | |
| Line 4: Witnesses Volume Number:Page Number | |
| OATHOUT, SUSAN E 27, Commerce, Oakland and | |
| Edward E Witbuck 26, Howell | |
| 9/11/1862 at Howell by JP Daniel Case | |
| George W Morris and William White | 3:5 |
| ODELL, CATHARINE E 23, Hartland and | |
| Clinton McHenry 26, Hartland | |
| 6/14/1854 by Rev Alonzo May | |
| Silas Odell, Hartland and Treves Shain, Mundy | 2:112 |
| ODELL, MARY 21, Iosco and | |
| William Gillman 21, White Oak, Ingham | |
| 2/22/1856 by JP Ara Smith | |
| Augustus Odell and Mary Wooden | 2:172 |
| ODELL, SARAH 41, Iosco and | |
| Allen Woolverton 56, White Oak, Ingham | |
| 11/21/1869 at Iosco by JP Milton Bradley | |
| Charles Odell, Iosco and Ruben Odell, Iosco | 3a:24 |
| OLDS, AUGUSTA 17, Conway and | |
| Edward B Barker 24, Conway | |
| 11/9/1859 at Conway by JP P Silsby | |
| Darius Rust, Conway and Louisa Rust, Conway | 2:287 |
| OLDS, JANE 51, Conway and | |
| Israel Miner 54, Cohoctah | |
| 9/13/1859 by JP Charles Drum | |
| Seth Miner, Conway and M C Olds, Conway | 2:280 |
| OLDS, ORILLA S 14, Putnam and | |
| Almon C Green 20, Unadilla | |
| 5/22/1853 by JP Theron Winana | |
| N H Winans, Unadilla and Ellen Green, Unadilla | 2:87 |
| O'NEIL, SARAH A 19, Genoa and | |
| George Phillips 26, Genoa | |
| 10/20/1862 at Genoa by Rev George W Jenks | |
| Alice J Walker, Milford and Delia A Jenks, Genoa | 3:14 |
| OSBORN, MARY E 21, Iosco and | |
| Thomas M Bakewell 23, Dansville, --- | |
| 12/12/1870 at Iosco by Rev William D Tomkinson | |
| Mary Osborn, Iosco and Sarah M Wright, Grand Blanc | 3a:32 |
| OSTEANDER, LUCY L 26, Howell and | |
| John D Van Blaircon 47, Howell | |
| 11/4/1868 at Howell by JP Nicholas Lake | |
| Elizabeth F Lake, Howell and Esther Lake | 3a:14 |
| OTT, ELIZABETH 20, Cohoctah and | |
| Adam Thompson 27, Cohoctah | |
| 2/3/1869 at Cohoctah by JP M Thatcher | |
| H Thatcher, Cohoctah and John Howissen, Cohoctah | 3a:18 |
| OZMAN, PERSILLA 20, Dexter, Washtenaw and | |
| Valancourt Henson 26, White Oak, Ingham | |
| 1/18/1870 at Plainfield by Rev A C Fuller | |
| Arthur Isham, Onondaga and Miss Malissa Wasson, Unadilla | 3a:33 |