| Line 1: Groom's Name, Age and Residence | |
| Line 2: Bride's Name, Age and Residence | |
| Line 3: Marriage Date and Place; Person perfoming marriage | |
| Line 4: Witnesses Volume Number:Page Number | |
| ODELL, MORRIS 36, OH and | |
| Emily Jane Ralf 20, Handy | |
| 7/27/1863 at Iosco by JP Gilbert Caswell | |
| 3:45 | |
| OLDS, M C 29, and | |
| Hattie A Benjamin 18, Conway | |
| 6/27/1866 by JP Nelson B Green | |
| John Mehan and William A Benjamin | 3:156 |
| OLDS, ROBERT W 23, Green Oak and | |
| Hattie Parker 22, Green Oak | |
| 9/22/1869 at Green Oak by Rev Charles Dunlap | |
| Sebina Moses, Washington DC and Warren Parker, Green Oak | 3a:21 |
| OLIVER, JOHN F 22, Hamburg and | |
| Abby L Hodgeman 18, Putnam | |
| 12/31/1850 by Rev E W Borden | |
| William Hodgeman, Putnam and Sarah Morse, Putnam | 2:25 |
| OLMSTED, GEORGE B 21, Hartland and | |
| Cordelia Whitlock 19, Hartland | |
| 6/16/1866 at Hartland by Rev P C Dayfoot | |
| Charles B Phillips, Hartland and Almira Roberts, Hartland | 3:166 |
| OLSAVER, HARRISON 30, Green Oak and | |
| Rosina Davison 23, Green Oak | |
| 8/25/1870 at Green Oak by Rev A W Ensign | |
| S Livins, Green Oak and Francis Livins, Green Oak | 3a:30 |
| OLSAVER, HENRY M 27, Green Oak and | |
| Jennie C Cunningham 22, Hamburg | |
| 10/30/1867 at Hamburg by Rev Albert C Lewis | |
| William Olsaver, Green Oak and J Cunningham, Hamburg | 3a:2 |
| O'NEEL, DANIEL R Hamburg and | |
| Caroline C Hall Hamburg | |
| 2/7/1855 at house of Aaron Brower, Unadilla by JP J L Field | |
| Aaron Brower and Terence McLear | 2:144 |
| ORMSBY, HENRY 27, Stockbridge, Ingham and | |
| Cordelia Wheaton 22, Stockbridge, Ingham | |
| 5/30/1854 at Putnam by Rev B Bayn | |
| Oscar Gregory and Elmina Stephens | 2:110 |
| ORR, ALEXANDER 23, Burns, Shiawassee and | |
| Eliza Borden 19, Argentine, Genesee | |
| 8/15/1861 at Cohoctah by JP Luther Pratt | |
| L S Pratt and James Haddsell | 2:366 |
| ORVEN, H C 41, Oceola and | |
| Diantha Williams 32, Oceola | |
| 5/13/1851 by JP K S Franklin | |
| Moses Bidelman, Oceola and Polly Bidelman, Oceola | 2:36 |
| OSBORNE, THOMPKINS 28, Brighton and | |
| Sarah Dibble 19, Oceola | |
| 4/2/1855 by JP Floyd Williams | |
| Maria Williams and Frederick H--- | 2:151 |
| OSGOOD, GARDNER J 30, Adrian and | |
| Louise Twitchel 20, Hamburg | |
| 11/25/1867 at Hamburg by Rev Albert C Lewis | |
| D Cramer, Ann Arbor and C M Osgood, Hamburg | 3a:5 |
| OWLEYN, WILLIAM H 63, Mecosta, Mesta and | |
| Louisa Reed 55, Genoa | |
| 10/30/1866 at Genoa by Rev William Stedman | |
| William T Barnard, Genoa and Julia Barnard, Genoa | 3:141 |