- CLMC Corp.1
- Cadillac Fairview2
- Cain, Walker O., 1915-19931
- Cajorco Realty Corp.1
- Caledonian Insurance Company1
- California Sugar Refinery1
- Calvin-Morris Corp.12
- Cambridge Realty Corp.1
- Campagna Construction Corp.13
- Campagna, Anthony8
- Campagna, Armino A.2
- Campagna, John J.6
- Campagna, Joseph A.2
- Campagna, Michael A.2
- Campbell & Cutler Paint & Glass Co.1
- Campbell & Dick1
- Campbell Glass & Paint Co.1
- Campbell Mfg. Co.1
- Campbell, Nichols & Gwyer1
- Candee Realties1
- Candela, Rosario68
- Canin1
- Capewell Horse Nail Co.1
- Capri Apartments, Inc.1
- Carbon Dioxide and Magnesia Company1
- Carey Bros. & Grevmeyer2
- Carey, Richard J.1
- Carlton Estate Inc.1
- Carlyle Construction Corp.1
- Carner, Ingram S.5
- Carner, Jack2
- Carol Enterprises, Inc.1
- Carol Management Corp.46
- Carol Sales Corp.1
- Carpenter, J.E.R.9
- Carreau, Lewis2
- Carrollton1
- Carscallen & Cassidy1
- Carson & Hard1
- Carson City Savings Bank1
- Carson and Lundin2
- Cary Manufacturing Co.2
- Casale and Nowell11
- Casale, James E.2
- Castle Bro's & Loupe1
- Castle Brothers4
- Caton Apartments, Inc.3
- Caughey and Evans3
- Caughey, A. Rollin19
- Caughey, Rollin A.12
- Cauldwell-Wingate Co., Inc.6
- Ced-Hill Construction Corp.3
- Cedar Hollow Lime Company1
- Central Bank1
- Central Safe Deposit Co.1
- Centre City Org.6
- Champney, Brothers & Co.1
- Chapman & Soden1
- Chapman Valve Manufacturing Co.1
- Charles Baker & Co.1