- Cal-Par Corporation, also known as the Hood Products Corporation, from New York, N. Y.1
- California Fruit Chimes Co.1
- Cannon Valley Milling Co.1
- Capitol Fish Co.1
- Carl Ahlers, Inc.1
- Centennial Flouring Mills Co.1
- Central Baking Co.1
- Central Grain and Malting Co.1
- Charles Bodine, Westville, N. J.1
- Charles C. Craigo, trading as the C. C. Remedy Co., at La Valle, Wis.1
- Christensen Products Co.1
- Cincinnati Bakers Supply Company1
- Cleveland-Sandusky Brewing Corporation1
- Cleveland-Sandusky Brewing Corporation, Cleveland, Ohio, and the Atlantic Co.1
- Clover Creamery Co.1
- Collen County Mill and Elevator Co.1
- Colonial Baking Co. and T. C. Cocoas & Co.1
- Comet Candy Co.1
- Commander Milling Co.1
- Cream1