| Oregon Federal Census Index 1930 | ||||
| Wheeler County | Series T626 | |||
| Name | Precinct | ED No. | Sheet No. | Line No. |
| O'Hara, Ben | Mitchell | 8 | 2 | 48 |
| O'Hara, Hattie | Mitchell | 8 | 2 | 49 |
| Oie, John | Kinzua | 5 | 2 | 31 |
| O'Kelley, Elizabeth | Mitchell | 8 | 2 | 76 |
| O'Kelley, Maryl E. | Mitchell | 8 | 2 | 78 |
| O'Kelley, T. Patrick | Mitchell | 8 | 2 | 77 |
| O'Kelley, Thomas G. | Mitchell | 8 | 2 | 75 |
| Olson, Earl | Kinzua | 5 | 2 | 16 |
| Opsund, Arvilla | Kinzua | 5 | 3 | 79 |
| Opsund, Oluf | Kinzua | 5 | 3 | 77 |
| Opsund, Pearl | Kinzua | 5 | 3 | 78 |
| O'Raurke, John P. | Fossil - Fossil Town | 3 | 3 | 98 |
| Osborn, A. Marie | Richmond | 10 | 1 | 22 |
| Osborn, Alice | Richmond | 10 | 1 | 35 |
| Osborn, Clyde U. | Richmond | 10 | 1 | 28 |
| Osborn, Dean A. | Richmond | 10 | 1 | 30 |
| Osborn, Delbert | Mitchell | 8 | 2 | 36 |
| Osborn, Donald Ray | Richmond | 10 | 1 | 37 |
| Osborn, Edith M. | Richmond | 10 | 1 | 16 |
| Osborn, Elmer | Mitchell | 8 | 2 | 34 |
| Osborn, Ercil | Mitchell | 8 | 2 | 41 |
| Osborn, Glenn | Richmond | 10 | 1 | 34 |
| Osborn, Glenna | Richmond | 10 | 1 | 36 |
| Osborn, Grace | Richmond | 10 | 1 | 21 |
| Osborn, H. Floyd | Richmond | 10 | 1 | 18 |
| Osborn, H. Harrison | Richmond | 10 | 1 | 38 |
| Osborn, J. Lloyd | Richmond | 10 | 1 | 19 |
| Osborn, Joe R. | Richmond | 10 | 1 | 20 |
| Osborn, Lavine A. | Richmond | 10 | 1 | 31 |
| Osborn, Lelia A. | Richmond | 10 | 1 | 29 |
| Osborn, Maggie | Mitchell | 8 | 2 | 33 |
| Osborn, Marion | Mitchell | 8 | 2 | 40 |
| Osborn, Marion | Richmond | 10 | 1 | 33 |
| Osborn, Neva L. | Richmond | 10 | 1 | 17 |
| Osborn, O. Vlean | Richmond | 10 | 1 | 23 |
| Osborn, Raymond | Mitchell | 8 | 2 | 37 |
| Osborn, Robert | Mitchell | 8 | 2 | 39 |
| Osborn, Roy T. | Richmond | 10 | 1 | 15 |
| Osborn, Virgil | Mitchell | 8 | 2 | 35 |
| Osborn, Walter | Mitchell | 8 | 2 | 38 |
| Osborn, Willet S. | Mitchell | 8 | 2 | 32 |
| Osborn, Wilma V. | Richmond | 10 | 1 | 32 |
| Osborne, Bertha | Spray | 13 | 2 | 51 |
| Osborne, Dora F. | Spray | 13 | 2 | 53 |
| Osborne, Garfield | Spray | 13 | 2 | 54 |
| Osborne, Mary F. | Spray | 13 | 2 | 52 |
| Osborne, Ted | Spray | 13 | 2 | 50 |
| Ostrander, Francis | Kinzua | 5 | 4 | 96 |
| Overley, Carl J. | Fossil - Fossil Town | 3 | 5 | 75 |
| Overley, Clyde E. | Fossil - Fossil Town | 3 | 5 | 73 |
| Overley, Verne A. | Fossil - Fossil Town | 3 | 5 | 74 |
| Owens, Alice | Fossil - Fossil Town | 3 | 3 | 80 |
| Owens, Anna | Fossil - Fossil Town | 3 | 3 | 82 |
| Owens, Boyd | Richmond | 10 | 2 | 32 |
| Owens, Charles W. | Fossil - Fossil Town | 3 | 3 | 75 |
| Owens, Freddie L. | Kinzua | 5 | 1 | 97 |
| Owens, Hugh L. | Fossil | 4 | 3 | 100 |
| Owens, Jack | Kinzua | 5 | 1 | 98 |
| Owens, John W. | Kinzua | 5 | 1 | 95 |
| Owens, Leland H. | Fossil - Fossil Town | 3 | 3 | 81 |
| Owens, Lena U. | Kinzua | 5 | 1 | 96 |
| Owens, Mary | Fossil - Fossil Town | 3 | 3 | 76 |
| Owens, Paul | Rock Creek | 11 | 1 | 18 |
| Owens, Priscilla I. | Rock Creek | 11 | 1 | 50 |
| Owens, Robert | Fossil - Fossil Town | 3 | 3 | 78 |
| Owens, William | Fossil - Fossil Town | 3 | 3 | 77 |
| Owens, William Sr. | Fossil - Fossil Town | 3 | 3 | 79 |