| 1895 02 15 | O'Connell, Daniel E. | Feeny, Winefred | |
| 1895 02 05 | O'Connor, Charles A. | Bubb, Bertha Anna | |
| 1893 04 02 | O'Daugherty, Joseph G. | Stewart, Stella | |
| 1892 10 12 | O'Dell, Elmer | Damewood, Martha | |
| 1890 03 05 | O'Dell, Lester L. | Fitch, E. May | |
| 1890 06 29 | Odell, Mahlon Monroe | Dugan, Alice | |
| 1887 08 29 | O'Dell, Warren | Lindsay, Dora B. | |
| 2011 Jun eng | Ogle, Joshua Gordon | Mason, Erin Tia | 24 Sep 2011 |
| 1893 04 18 | Older, A[lbert] F. | Swett, Dora F. | |
| 1882 12 30 | Oleson, P. Sterling | Farr, Emma | |
| 1878 12 03 | Oliver, Samuel J. | Riggs, Rhoda E. | |
| 1880 10 05 | Olmsted, Fred | Crane, Laura E. | |
| 1880 03 25 | Opdyke, James P. | Titus, Julia E. | |
| 1878 03 04 | Oplinger, George A. | Ralph, Hannah | |
| 1873 10 26 | Ormsby, A.T. | Lamb, Mary | |
| 1881 09 01 | Ormsby, L.P. | Kidder, E.R. | |
| 2010 08 27 lic | Ortiz-Chavez, Andrea | Lara-Guillen, Adelaido | |
| 1878 06 27 | Orton, Mathew | Shade, Zoa | |
| 1880 02 11 | Orton, Sylvester | Greenlee, S. Emma | |
| 1884 09 10 | Orton, Sylvester S. | Greenlee, Eliza M. | |
| 1869 06 06 | Osborn, Jason | Baker, M.E. | |
| 1879 09 28 | Otis, Merrell | McGuire, Mary, Mrs | |
| 1875 05 01 | Overman, J.M. | Neeley, Maggie | |
| 2013 06 15 lic | Owen, Dustin James-Harley of Lenox | Grundman, Brooke Nicole of Lenox | |
| 1876 08 16 | Owen, J.B. | Grigg, Almira | |
| 1873 02 26 | Owen, Samuel | Works, Mary | |
| 1881 09 18 | Owens, J.B. | Golding, Electa | |
| 1880 04 29 | Owings, J.W. | Hosman, Emma | |
| 1860 01 18 | Oxley, A.B. | McFarland, Harriet | |
| 1858 05 13 | Oxley, Ethan I. | Allen, Asenath E. | |
| 1881 09 22 | Oxley, J.L. | Ray, Melinda | |
| 1860 03 15 | Oxley, Philip | Lambert, Rebecca | |
| 1859 01 02 | Oxley, William | Laswell, Rosanna |