| SURNAME | EVENT | NEWSPAPER | DATE | PAGE | COL. | |
| O | ||||||
| OADHAM | Helen | Marriage | Nevada Daily Transcript | 01 Apr 1866 | 2 | 3 |
| OAKES | a daughter | Birth | Nevada Daily Transcript | 28 Jul 1869 | 2 | 4 |
| OATES | a daughter to Sam T. | Birth | Nevada Daily Transcript | 19 Nov 1865 | 2 | 2 |
| OATES | a son to Samuel T. | Birth | Nevada Journal | 01 Feb 1861 | 2 | 6 |
| OATES | Hattie | Death | Nevada Daily Gazette | 06 Aug 1866 | 2 | 3 |
| OATES | William Thomas | Death | Nevada Daily Gazette | 12 Mar 1864 | 2 | 3 |
| O'BRIAN | Pat | Death | Grass Valley Union | 30 Dec 1868 | 2 | 3 |
| O'BRIEN | Pat | Death | Nevada Daily Transcript | 29 Dec 1868 | 3 | 1 |
| O'BRIEN | Rosa | Death | The Nevada Democrat | 08 Jul 1862 | 2 | 4 |
| O'BRYAN | William | Death | Grass Valley Union | 26 Jul 1865 | 2 | 3 |
| O'CONNER | Bridget | Marriage | Nevada Daily Transcript | 01 Oct 1864 | 2 | 4 |
| O'CONNER | Patrick | Death | Nevada Daily Gazette | 22 Oct 1866 | 2 | 2 |
| O'CONNOR | a son to James | Birth | Grass Valley Union | 20 Jul 1865 | 2 | 3 |
| O'CONNOR | M. P. | Marriage | Grass Valley Union | 28 Sep 1869 | 2 | 4 |
| ODELL | daughter of H. W. | Death | Grass Valley Union | 01 Jun 1867 | 2 | 3 |
| ODELL | G. M. | Death | The Nevada Democrat | 09 May 1860 | 2 | 4 |
| ODGERS | Henry | Naturalized | Nevada Daily Gazette | 02 Sep 1867 | 3 | 1 |
| ODGERS | Henry | Marriage | Nevada Daily Transcript | 09 Oct 1868 | 2 | 4 |
| ODGERS | James | Naturalized | Nevada Daily Gazette | 04 Jun 1867 | 3 | 1 |
| O'DONALD | William | Death | The Nevada Democrat | 13 Feb 1862 | 2 | 4 |
| O'DONNELL | son of Wm. | Death | Grass Valley Union | 07 Jul 1868 | 3 | 1 |
| O'FLAHERTY | Catherine | Marriage | Nevada Daily Transcript | 04 Jan 1866 | 2 | 3 |
| O'GARA | John | Naturalized | Nevada Daily Gazette | 01 Aug 1867 | 3 | 1 |
| OGDEN | a son to Robert | Birth | Nevada Daily Transcript | 24 Jan 1865 | 2 | 3 |
| OGERS | Henry | Marriage | Nevada Daily Gazette | 09 Oct 1868 | 2 | 4 |
| O'HEARN | a son to Michael | Birth | Nevada Daily Transcript | 12 Jan 1869 | 2 | 3 |
| O'KEEFE | a daughter to Joseph | Birth | Grass Valley Union | 20 Aug 1865 | 2 | 3 |
| OLDHAM | Alice | Marriage | Nevada Daily Gazette | 28 Mar 1865 | 2 | 4 |
| OLDHAM | Alice | Marriage | Nevada Daily Transcript | 28 Mar 1865 | 2 | 3 |
| OLINGER | A. A. | Marriage | Nevada Journal | 22 Mar 1861 | 2 | 6 |
| OLINGER | A. A. | Marriage | The Nevada Democrat | 21 Mar 1861 | 2 | 4 |
| OLINGER | A. A. | Marriage | Nevada Daily Transcript | 21 Mar 1861 | 2 | 4 |
| OLINGER | Archibald | Marriage | The Hydraulic Press | 23 Mar 1861 | 2 | 4 |
| OLSON | M. | Death | The Nevada Democrat | 14 Aug 1862 | 3 | 1 |
| O'NEAL | Morris | Naturalized | Nevada Daily Gazette | 03 Sep 1867 | 3 | 1 |
| O'NEAL | Morris | Death | The Nevada Democrat | 31 Jul 1862 | 3 | 1 |
| O'NEIL | Dennis | Marriage | Nevada Daily Gazette | 08 Sep 1868 | 2 | 4 |
| O'NEIL | Jerry | Citizenship | Nevada Daily Gazette | 22 Nov 1864 | 3 | 1 |
| O'NEILL | Michael | Death | Grass Valley Union | 11 Sep 1867 | 3 | 2 |
| ORD | Benjamin | Death | Nevada National | 26 May 1860 | 2 | 6 |
| ORGAN | a son to W. J. | Birth | Nevada Daily Gazette | 15 Sep 1866 | 2 | 3 |
| ORGAN | a son to W. J. | Birth | Nevada Daily Transcript | 16 Sep 1866 | 2 | 2 |
| ORGAN | a son to W. J. | Birth | Nevada Daily Transcript | 26 Jul 1868 | 2 | 3 |
| ORGAN | W. J. | Marriage | Nevada Daily Transcript | 04 Jan 1866 | 2 | 3 |
| O'ROURKE | Daniel | Citizenship | Grass Valley Union | 20 May 1868 | 3 | 1 |
| OSBORN | Mary | Marriage | Nevada Daily Gazette | 23 Apr 1868 | 2 | 3 |
| OSBORN | Mary | Marriage | Nevada Daily Transcript | 23 Apr 1868 | 2 | 3 |
| OSBORN | Richard | Death | Nevada Daily Gazette | 22 Nov 1864 | 3 | 1 |
| OSBORN | Richard | Death | Nevada Daily Transcript | 22 Nov 1864 | 3 | 1 |
| OSBORNE | a daughter to William | Birth | Nevada Daily Transcript | 24 Jan 1866 | 2 | 4 |
| OSBURN | Wm. | Marriage | The Nevada Democrat | 29 Apr 1862 | 2 | 4 |
| OSGOOD | Frank | Death | Grass Valley Union | 14 May 1867 | 3 | 3 |
| OTHEMAN | A. H. | Death | Nevada Daily Transcript | 30 Jun 1867 | 2 | 3 |
| OTHEMAN | Anthony Henry | Death | Nevada Daily Gazette | 01 Jul 1867 | 2 | 3 |
| OTHET | Thomas | Marriage | Nevada National | 15 Jan 1859 | 2 | 6 |
| OTT | a daughter to C. | Birth | Nevada Daily Transcript | 16 Sep 1866 | 2 | 2 |
| OTT | a daughter to James J. | Birth | Nevada Daily Gazette | 05 May 1865 | 2 | 4 |
| OTT | a son to J. J. | Birth | The Nevada Democrat | 20 Mar 1862 | 2 | 4 |
| OTT | a son to James J. | Birth | Nevada Daily Gazette | 18 Dec 1867 | 2 | 2 |
| OTT | Charles F. | Death | Nevada Daily Gazette | 01 Jul 1868 | 2 | 3 |
| OTT | James J. | Marriage | Nevada Daily Transcript | 25 Jun 1861 | 2 | 4 |
| OTT | James T. | Marriage | The Nevada Democrat | 25 Jun 1861 | 2 | 4 |
| OTT | Jas. J. | Marriage | Nevada Journal | 28 Jun 1861 | 2 | 5 |
| OTZMAN | John | Citizenship | Nevada Daily Transcript | 10 Aug 1865 | 2 | 3 |
| OUKEN | Gerard | Marriage | Nevada Journal | 30 Aug 1861 | 2 | 6 |
| OULD | a son to H. | Birth | Grass Valley Union | 04 Jun 1865 | 2 | 3 |
| OVERMYER | Edward | Marriage | Nevada Daily Gazette | 24 Mar 1868 | 2 | 3 |
| OVERMYER | Edward | Marriage | Nevada Daily Transcript | 24 Mar 1868 | 2 | 3 |
| OVERTON | Dr. Charles T. | Death | Grass Valley Union | 01 Dec 1869 | 3 | 1 |
| OVERTON | Kate F. | Marriage | Nevada Daily Gazette | 25 Apr 1864 | 2 | 3 |