Marshall County, Indiana - USGenWeb
1898, 1908, 1925
| Name | Township | Year | SEC. | TP. | R.E. |
| O'Connell, J. | Green | 1898 | 32 | 32 | 2 |
| O'Conner, William | Union | 1925 | 30 | 32 | 1 |
| O'Conner, William | Union | 1925 | 19 | 32 | 1 |
| O'Conner, Wm. | Union | 1908 | 19 | 32 | 1 |
| O'Conner, Wm. | Union | 1908 | 30 | 32 | 1 |
| O'Connor, W. | Union | 1898 | 19 | 32 | 1 |
| O'D, T. | Center - North | 1925 | 27 | 34 | 2 |
| O'Donnel, D. + T. | Center | 1898 | 28 | 34 | 2 |
| O'Donnel, Dan'l | Center - North | 1925 | 27 | 34 | 2 |
| O'Donnel, T. | Center | 1898 | 27 | 34 | 2 |
| O'Donnel, T. | Center | 1898 | 27 | 34 | 2 |
| O'Donnell, Dan'l. | Center | 1908 | 27 | 34 | 2 |
| O'Donnell, Thos. | Center | 1908 | 27 | 34 | 2 |
| O'Donnell, Thos. | Center - North | 1925 | 28 | 34 | 2 |
| O'Donnell, Thos. JR. | Center | 1908 | 28 | 34 | 2 |
| O'Hare, John B. | West | 1908 | 12 | 33 | 1 |
| O'Keefe, T. | Center | 1898 | 29 | 34 | 2 |
| O'Keefe, W. | North | 1898 | 19 | 34 | 2 |
| O'Keefe, W. | Union | 1925 | 28 | 32 | 1 |
| O'Keefe, Wm. | North | 1908 | 6 | 34 | 2 |
| O'Keefe, Wm. | Polk | 1898 | 10 | 34 | 1 |
| O'Keefe, Wm. | Polk | 1908 | 16 | 34 | 1 |
| O'Keefe, Wm. | Polk | 1908 | 10 | 34 | 1 |
| O'Keefe, Wm. | Polk | 1908 | 15 | 34 | 1 |
| O'Keefe, Wm. + wife | Polk | 1898 | 16 | 34 | 1 |
| O'Keefe, Wm. + wife | Polk | 1898 | 15 | 34 | 1 |
| O'Neal, Wm. C. | Walnut | 1925 | 28 | 32 | 3 |
| O'Neil, Bailey | Walnut | 1908 | 28 | 32 | 3 |
| O, C. | Bourbon | 1925 | 4 | 33 | 3 |
| O, C. | Polk | 1925 | 20 | 34 | 1 |
| O, C. | Walnut | 1925 | 31 | 33 | 3 |
| O, F. | Union | 1925 | 32 | 33 | 1 |
| O, G. | Union | 1925 | 9 | 32 | 1 |
| O, J.H. | Center | 1898 | MRL | 13 | |
| O, L. | Union | 1925 | 9 | 32 | 1 |
| O, M. | Union | 1925 | 9 | 32 | 1 |
| O, S. | Walnut | 1925 | MRL 21 | | |
| O, Z. | Center - Sourth | 1925 | 6 | 33 | 3 |
| Oberg, A. | Polk | 1925 | 7 | 34 | 1 |
| Oberg, David M. | Polk | 1925 | 6 | 34 | 1 |
| Oberg, David M. | Polk | 1925 | 7 | 34 | 1 |
| Oberg, Emil | Polk | 1908 | 7 | 34 | 1 |
| Oberlin, L. E. | West | 1925 | 5 | 33 | 1 |
| Obers, Emil | Polk | 1908 | 6 | 34 | 1 |
| Ocker, D.R. | Center | 1908 | 24 | 34 | 2 |
| Ogden, B. | Union | 1925 | 18 | 32 | 1 |
| Ogden, Bruce | Union | 1925 | 18 | 32 | 1 |
| Ogle, A. M. | Union | 1898 | 27 | 32 | 1 |
| Oglesbee, J.S. | Center | 1898 | MRL | 16 | |
| Oglesbee, J.S. | Polk | 1898 | 12 | 34 | 1 |
| Oglesbee, Jeann S. MRL | Center | 1908 | 16 | | |
| Oglesbee, Jennie S | Polk | 1908 | 12 | 34 | 1 |
| Oglesbee, R. B. | Polk | 1898 | 11 | 34 | 1 |
| Ohler, C. + E. | Walnut | 1925 | 32 | 33 | 3 |
| Ohler, C. W. + Eva E. | Walnut | 1908 | 32 | 33 | 3 |
| Ohler, C.W. | Walnut | 1898 | 31 | 33 | 3 |
| Ohler, Chas. W. | Walnut | 1908 | 31 | 33 | 3 |
| Ohler, Henry est. | Walnut | 1908 | 31 | 33 | 3 |
| Ohler, J.M. | Walnut | 1898 | 31 | 33 | 3 |
| Olcott, F. P. | Tippecanoe | 1908 | 19 | 32 | 4 |
| Olduffer, W.P.M. | Bourbon | 1908 | 4 | 33 | 3 |
| Olduffer, W.P.M. | Bourbon | 1908 | 33 | 34 | 3 |
| Oler, J. | Green | 1925 | 18 | 32 | 2 |
| Oleson, B.M. | Polk | 1898 | 18 | 34 | 1 |
| Olsen, C. + S. | Center - Sourth | 1925 | 5 | 33 | 3 |
| Olsenberg, C. + S.E. | Center | 1908 | 5 | 33 | 3 |
| Olson, Albert | West | 1925 | 13 | 33 | 1 |
| Olson, Arthur | Center - Sourth | 1925 | 6 | 33 | 2 |
| Olson, J. | Polk | 1908 | 20 | 34 | 1 |
| Olson, O. G. | West | 1898 | 30 | 34 | 1 |
| Olson, Olaf G. | West | 1908 | 30 | 34 | 1 |
| Olston, A. | West | 1925 | 1 | 33 | 1 |
| Oolson, J.F. | Polk | 1898 | 19 | 34 | 1 |
| Ormsby, Wm. J. | Union | 1908 | 32 | 33 | 1 |
| Ormsby, Wm. J. | West | 1908 | 30 | 33 | 1 |
| Orr, Sherman MRL | Center | 1908 | 15 | | |
| Orr, T.B. | Center | 1898 | MRL | 15 | |
| Orr, T.B. | Center | 1898 | MRL | 14 | |
| Orval, Robert | West | 1925 | 36 | 34 | 1 |
| Osborn, Amos | Union | 1898 | 7 | 32 | 1 |
| Osborn, Amos | Union | 1908 | 7 | 32 | 1 |
| Osborn, Amos | Union | 1925 | 7 | 32 | 1 |
| Osborn, E. B. | Union | 1898 | 7 | 32 | 1 |
| Osborn, Geo. | Union | 1925 | 6 | 32 | 1 |
| Osborn, Geo. M. | Union | 1908 | 5 | 32 | 1 |
| Osborn, Geo. M. | Union | 1908 | 6 | 32 | 1 |
| Osborn, George | Union | 1925 | 5 | 32 | 1 |
| Osborn, H. B. | Union | 1898 | 7 | 32 | 1 |
| Osborn, H. S. + wife | Union | 1908 | 7 | 32 | 1 |
| Osborn, John | Union | 1908 | 36 | 32 | 1 |
| Osborn, John | Union | 1908 | 35 | 32 | 1 |
| Osborn, John | Union | 1925 | 36 | 32 | 1 |
| Osborn, Leonard | Union | 1908 | 6 | 32 | 1 |
| Osborn, William | Union | 1898 | 6 | 32 | 1 |
| Osborn, Wm. O. | Union | 1925 | 19 | 32 | 1 |
| Osborne, J. C. | West | 1898 | 30 | 33 | 1 |
| Overholt, Sarah A. | Bourbon | 1908 | 28 | 33 | 4 |
| Overholt, U. + L. | North | 1925 | 30 | 35 | 2 |
| Overman, J. E. | Union | 1898 | 30 | 32 | 1 |
| Overman, Wm. | Union | 1908 | 31 | 32 | 1 |
| Overmeyer, A. | Union | 1898 | 18 | 32 | 1 |
| Overmeyer, A. | Union | 1898 | 7 | 32 | 1 |
| Overmeyer, B | Union | 1898 | 10 | 32 | 1 |
| Overmeyer, B. | Union | 1898 | 9 | 32 | 1 |
| Overmeyer, C. | Union | 1898 | 9 | 32 | 1 |
| Overmeyer, C. | Union | 1898 | 10 | 32 | 1 |
| Overmeyer, F. | Green | 1898 | 35 | 32 | 2 |
| Overmeyer, F. | Union | 1898 | 33 | 33 | 1 |
| Overmeyer, F. | Union | 1898 | 5 | 32 | 1 |
| Overmeyer, F. | Union | 1898 | 15 | 32 | 1 |
| Overmeyer, F., Etal | Union | 1898 | 6 | 32 | 1 |
| Overmeyer, Frank | Union | 1898 | 4 | 32 | 1 |
| Overmeyer, Franklin | Union | 1898 | 7 | 32 | 1 |
| Overmeyer, H. | Union | 1898 | 3 | 32 | 1 |
| Overmeyer, H.B. | Union | 1898 | 8 | 32 | 1 |
| Overmeyer, I. E. | Union | 1898 | 5 | 32 | 1 |
| Overmeyer, I. E. | Union | 1898 | 7 | 32 | 1 |
| Overmeyer, L. | Union | 1898 | 5 | 32 | 1 |
| Overmeyer, L., Etal | Union | 1898 | 6 | 32 | 1 |
| Overmeyer, M. | Union | 1898 | 9 | 32 | 1 |
| Overmeyer, M. | Union | 1898 | 10 | 32 | 1 |
| Overmeyer, M. S. | Union | 1898 | 7 | 32 | 1 |
| Overmeyer, M.B. | Union | 1898 | 7 | 32 | 1 |
| Overmeyer, M.S. | Union | 1898 | 8 | 32 | 1 |
| Overmeyer, P. | Union | 1898 | 4 | 32 | 1 |
| Overmeyer, S. | Union | 1898 | 34 | 32 | 1 |
| Overmeyer, Washington | Union | 1898 | 35 | 32 | 1 |
| Overmeyer, Wm. S. | Union | 1898 | 33 | 33 | 1 |
| Overmyer, A. | Union | 1908 | 7 | 32 | 1 |
| Overmyer, Albert | Union | 1908 | 5 | 32 | 1 |
| Overmyer, Albert | Union | 1908 | 1 | 32 | 1 |
| Overmyer, Ben | Union | 1908 | 10 | 32 | 1 |
| Overmyer, Ben | Union | 1908 | 9 | 32 | 1 |
| Overmyer, Ben | Union | 1925 | 9 | 32 | 1 |
| Overmyer, Charles | Union | 1908 | 9 | 32 | 1 |
| Overmyer, Charles | Union | 1925 | 9 | 32 | 1 |
| Overmyer, D. | Tippecanoe | 1925 | 24 | 32 | 3 |
| Overmyer, D. | Union | 1925 | 7 | 32 | 1 |
| Overmyer, E. | Green | 1908 | 35 | 32 | 2 |
| Overmyer, Edward | Green | 1925 | 35 | 32 | 2 |
| Overmyer, F. | Union | 1925 | 7 | 32 | 1 |
| Overmyer, F. etal | Union | 1908 | 6 | 32 | 1 |
| Overmyer, Frank | Union | 1925 | 32 | 33 | 1 |
| Overmyer, Frank | Union | 1925 | 31 | 33 | 1 |
| Overmyer, Franklin | Green | 1908 | 35 | 32 | 2 |
| Overmyer, Franklin | Union | 1908 | 7 | 32 | 1 |
| Overmyer, Franklin | Union | 1908 | 6 | 32 | 1 |
| Overmyer, Franklin | Union | 1908 | 5 | 32 | 1 |
| Overmyer, Franklin | Union | 1908 | 32 | 33 | 1 |
| Overmyer, Franklin | Union | 1908 | 4 | 32 | 1 |
| Overmyer, Franklin | Union | 1908 | 33 | 33 | 1 |
| Overmyer, Franklin | Union | 1908 | 31 | 33 | 1 |
| Overmyer, Franklin | Union | 1925 | 7 | 32 | 1 |
| Overmyer, Franklin | Union | 1925 | 6 | 32 | 1 |
| Overmyer, Franklin | Union | 1925 | 5 | 32 | 1 |
| Overmyer, Ida E. | Union | 1908 | 7 | 32 | 1 |
| Overmyer, Isaac | West | 1908 | 30 | 33 | 1 |
| Overmyer, J. | Union | 1925 | 3 | 32 | 1 |
| Overmyer, Jeremiah | Union | 1908 | 3 | 32 | 1 |
| Overmyer, Jeremiah | Union | 1925 | 4 | 32 | 1 |
| Overmyer, John H. | West | 1908 | 16 | 33 | 1 |
| Overmyer, L. | Union | 1925 | 4 | 32 | 1 |
| Overmyer, Lewis | Union | 1925 | 4 | 32 | 1 |
| Overmyer, Lewis | Union | 1925 | 33 | 33 | 1 |
| Overmyer, Lewis | West | 1925 | 29 | 33 | 1 |
| Overmyer, M. S. + S. | Green | 1908 | 31 | 32 | 2 |
| Overmyer, Marion | Union | 1908 | 9 | 32 | 1 |
| Overmyer, Martin | Union | 1925 | 9 | 32 | 1 |
| Overmyer, Mary | Union | 1908 | 10 | 32 | 1 |
| Overmyer, Mary | Union | 1908 | 7 | 32 | 1 |
| Overmyer, Mary | Union | 1908 | 9 | 32 | 1 |
| Overmyer, Schuler C. | Union | 1925 | 34 | 32 | 1 |
| Overmyer, Schuyler + wife | Union | 1908 | 34 | 32 | 1 |
| Overmyer, Stella | Union | 1925 | 34 | 33 | 1 |
| Overmyer, T(?) | Green | 1925 | 33 | 32 | 2 |
| Overmyer, Washington | Union | 1908 | 35 | 32 | 1 |
| Overmyer, Washington | Union | 1925 | 35 | 32 | 1 |
| Overmyer, Wm. S. | Union | 1908 | 33 | 33 | 1 |
| Overstreet, M. | Tippecanoe | 1898 | 18 | 32 | 4 |
| Overstreet, Mary, | Tippecanoe | 1908 | 18 | 32 | 4 |