Name is followed by the page number(s) in the Atlas on which they’re found.
| Iliff, S. M. 48 |
| Ingram, Robt. 23, 24 |
| Inman, M & M. O. 37 |
| Inman, M. & M. O. 37 |
| Iowa R. R. Land Co. 91 |
| Irwin, J. W. 38 |
| Isett, J. W. 43 |
| Ittner, Benj. 91 |
| Ittner, Bery 91 |
| Ivers, Claus 51 |
| Ivers, Hans 75 |
| Iwen, I. 79 |