| Name | Title | Department |
| Garces Obando, Freddy | Graduate Assistant | Plant Pathology and Crop Physiology Department |
| O'Dell, James "Greg" | IT Technician 2 | Support, Infrastructure, and Distance Education |
| O'Neil, Carol E. | Professor | School of Human Ecology |
| Oard, James H. | Professor | School of Plant, Environmental and Soil Sciences |
| Oard, Svetlana | Associate Professor - Research | Veterinary Science Department |
| Obanda, Diana N | Post Doctoral Researcher | Louisiana Forest Products Development Center |
| Obrien, Keely | Graduate Assistant | School of Animal Sciences |
| Odeh, Fuad M | Assistant Professor-Research | Veterinary Science Department |
| Olagues, Andre | Extension Associate | Biological and Agricultural Engineering Department |
| Olinde, Monica L. | Extension Agent | Pointe Coupee Parish |
| Oliveaux, James M. | Research Farm Assistant | Bob R. Jones - Idlewild Research Station |
| Olson, Douglas W. | Research Associate | School of Animal Sciences |
| Ordonez, Samuel | Graduate Student | School of Plant, Environmental and Soil Sciences |
| Orgeron, Albert | Associate Area Agent | St. James Parish |
| Ortego, Harold E. | Research Farm Manager | Dean Lee Research Station |
| Ortego, Jeff | Undergraduate student | Biological and Agricultural Engineering Department |
| Ortego, Patricia | Administrative Coordinator | Calcasieu Parish |
| Osbon, Bradley S. | Research Associate | Hill Farm Research Station |
| Osborne, Karol B. | Parish Chair, 4-H Youth Development | Madison Parish |
| Oster, Claudette | Research Farm Specialist | Central Stations |
| Ottea, James A. | Professor | Entomology Department |
| Overstreet, Charles | Professor | Plant Pathology and Crop Physiology Department |
| Overstreet, Karen | Interim Director, FCCS Divsion Head and Professor | School of Human Ecology |
| Owens, William E. | Professor | Hill Farm Research Station |
| Owings, Allen D. | Professor | Hammond Research Station |
| Van Osdell, Mary Ann | Assistant Communications Specialist | Communications |