Places
- California3
- California -- Gold discoveries2
- Camp Chase (Ohio)2
- Campbell County (Va.)1
- Charleston (W. Va.)2
- Charleston.4
- Chesapeake and Ohio Canal (Md. and Washington, D.C.)1
- Cincinnati (Ohio)1
- Clarksburg (W. Va.)3
- Clay County (W. Va.)1
- Colombia1
- Connecticut1
- Detroit (Mich.)1
- Doddridge County (W. Va.)2
- Duck Lick (W. Va.)1