| Oneal, Eleanor married Michael Sheridan in Allen County on 7-7-1840 |
| Oplinger, Daniel married Nancy Andrew in Allen County on 4-14-1850 |
| Oppenheim, Abraham married Emma Epstein in Allen County on 8-1-1847 |
| Orf, John married in Allen County on 11-12-1846 |
| Ormiston, Agnes F married Horace D in Allen County on 1-11-1848 |
| Ormiston, Elizabeth married Thomas Hamilton in Allen County on 12-17-1839 |
| Ormiston, James married Celista Baden in Allen County on 12-10-1842 |
| Orr, Eliza married Homer Howard in Allen County on 10-5-1847 |
| Orr, Jane married John Mann in Allen County on 5-15-1848 |
| Ort, Joseph married Mary Lowery in Allen County on 6-1-1846 |
| Ort, Katherine married John Baker in Allen County on 2-11-1849 |
| Orwig, Sarah E married Theodore Horton in Allen County on 11-11-1847 |
| Osborn, Nathan P married Elizabeth Baird in Allen County on 9-25-1838 |
| Osborn, Sarah married Elzey Thomas in Allen County on 1-1-1840 |
| Osborne, Rebecca married William Dalman in Allen County on 2-12-1839 |
| Osbun, John married Ann Clayton in Allen County on 1-1-1850 |
| Osbun, William married Emily Depew in Allen County on 1-3-1850 |
| Overholser, Mary married Henry Bricker in Allen County on 10-19-1843 |
| Oviatt, Julinanna married Recompense Tiffany in Allen County on 10-20-1841 |
| Owens, Ellen E married Robert Majors in Allen County on 11-16-1846 |
| P, Henry Gotleib married Maria Sophia Coltner in Allen County on 8-23-1842 |
| P, Mary Jane married Benjamin Newman in Allen County on 6-5-1849 |
| Paff, Rebecca married William Bowser in Allen County on 2-6-1845 |
| Paff, Sarah married Joseph Switz in Allen County on 6-23-1846 |
| Paige, Charles Jr married Grazilla Baker in Allen County on 12-4-1838 |
| Paine, Jonathan married Diana Coleman in Allen County on 8-27-1848 |
| Palmer, Lucius married Lucinda Cole in Allen County on 10-3-1841 |
| Palmer, Nancy married William Mc Donald in Allen County on 11-21-1840 |
| Palmer, William married Henrietta A Bracy in Allen County on 9-2-1845 |
| Panne, Louise married Henry Keiser in Allen County on 8-21-1847 |
| Papinbrink, Conrad married Wilhelmina Horstmeyer in Allen County on 8-31-1849 |
| Parent, Catherine married Sydney Bloomhuff in Allen County on 11-29-1838 |
| Parent, Catherine married Henry J Gloyd in Allen County on 8-24-1846 |
| Parent, Catherine married Daniel H in Allen County on 10-24-1849 |
| Parent, Elizabeth married Milton Heath in Allen County on 2-22-1844 |
| Parent, Elizabeth married A Herrick in Allen County on 3-19-1847 |
| Parent, Isiah married Pamelia Shugert in Allen County on 12-13-1849 |
| Parent, Margaret married John Sowers in Allen County on 4-9-1846 |
| Parent, Mary Ann married Jesse Klinger in Allen County on 12-14-1837 |
| Parent, Rachel married Allenson A. Rogers in Allen County on 5-20-1845 |
| Parish, Joseph married Irene Lake in Allen County on 11-14-1850 |
| Parish, Mary Ann married Joseph Levanway in Allen County on 6-20-1850 |
| Parker, Abigail married Newman Versail Hatch in Allen County on 1-31-1840 |
| Parker, Ann Frances married John Claud Kickley in Allen County on 7-27-1837 |
| Parker, Danfern married Emily Richards in Allen County on 10-27-1844 |
| Parker, Ellen married James Vandigrift in Allen County on 4-6-1843 |
| Parker, Hannah K married Stephen B Lewis in Allen County on 2-18-1841 |
| Parker, Hiram L married Sarah Ricard in Allen County on 2-12-1837 |
| Parker, Mary married Isiah Coleman in Allen County on 8-10-1848 |
| Parker, Samuel married Sarah Stuppelbaum in Allen County on 7-5-1849 |
| Parker, Samuel M married Martha Ann Jones in Allen County on 5-21-1846 |
