| 1 | C&I | CAMBRIA & INDIANA RAILROAD COMPANY | | | PWRC |
| 2 | C&IC | Cedar Rapids and Iowa City Ry. | 7/1923-7/1936 | | NAKINA |
| 3 | C&IC | Cedar Rapids and Iowa City Ry. | 23-Jul | | NRHS |
| 4 | C&IC | CEDAR RAPIDS & IOWA CITY RWY. | | | PWRC |
| 5 | C&IM | Chicago & Illinois Midland Ry. | 4/1938-1/1952 | | NAKINA |
| 6 | C&IM | Chicago & Illinois Midland Ry. Co. | 8/1920-7/1936 | | NAKINA |
| 7 | C&IM | Chicago & Illinois Midland Ry. Co. | 23-Jul | | NRHS |
| 8 | C&IM | Chicago & Illinois Midland Ry. | 4/38-1/52 | | NRHS |
| 9 | C&IM | CHICAGO & MIDLAND RWY. CO. (OUT OF EXISTENCE) | | | PWRC |
| 10 | C&IW | Chicago & Illinois Western R.R. | 7/1935-1/1952 | | NAKINA |
| 11 | C&IW | Chicago & Illinois Western R.R. | 4/38-1/52 | | NRHS |
| 12 | C&IW | CHICAGO & ILLINOIS WESTERN RAILROAD | | | PWRC |
