| Ohio Journalists | 6872 | Get Spreadsheet |
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| Opinion Journalists | 2004 | Get Spreadsheet |
| Oregon Journalists | 1653 | Get Spreadsheet |
| Oklahoma Journalists | 1500 | Get Spreadsheet |
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| Obesity Journalists | 503 | Get Spreadsheet |
| Ovarian Cancer Journalists | 447 | Get Spreadsheet |
| Oakland Journalists | 364 | Get Spreadsheet |
| Oil And Gas Journalists | 313 | Get Spreadsheet |
| Orthodontic Journalists | 213 | Get Spreadsheet |
| Online Business Journalists | 206 | Get Spreadsheet |
| Overland Park Journalists | 150 | Get Spreadsheet |
| Olympics Journalists | 105 | Get Spreadsheet |
| Organizing Journalists | 88 | Get Spreadsheet |
| Organic Beauty Journalists | 86 | Get Spreadsheet |
| Office 365 Journalists | 82 | Get Spreadsheet |
| Organic Food Journalists | 72 | Get Spreadsheet |
| Omaha Journalists | 41 | Get Spreadsheet |
| Oxnard Journalists | 34 | Get Spreadsheet |
| Ontario Journalists | 33 | Get Spreadsheet |
| Olathe Journalists | 27 | Get Spreadsheet |
| Organic Farming Journalists | 16 | Get Spreadsheet |
| Origami Journalists | 15 | Get Spreadsheet |
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