- Reed House2
- Reid, Murdoch & Co.3
- Reilly Bros. & Raub2
- Retail Merchants Association1
- Rheinstrom Bros.1
- Rhodes and Ripley Clothing Co.1
- Rice & Hutchins1
- Rice & Hutchins New York Co.1
- Rice & Miller1
- Richard E. Thibaut1
- Richard Fitzpatrick1
- Richards & Co.1
- Richards & Conover Hardware Co.2
- Richmond Cedar Works1
- Richmond Wheat & Corn Mills1
- Riggs National Bank2
- Riggs and Co.1
- Robert A. Rankin1
- Robert Dalzell & Co.1
- Robert Gair1
- Robert Graves & Co.1
- Robert Graves Co.1
- Robert Poole & Son, Co.1
- Robert, Johnson & Rand Shoe Co.2
- Roberts Sash & Door Co.1
- Roberts-MacNab-Breitbach Company1
- Rochester Storage and Warehouse Co.2
- Rock Island Plow Company2
- Rock River Cotton Co.3
- Rockford National Bank1
- Rodee, Bill & Co.1
- Roessler & Hasslacher Chemical Co.1
- Rogers & Co.1
- Rohe & Brother1
- Roper & Company1
- Ross, Sprague & Co. Wholesale Grocers1
- Rouse, Hazard & Co.1
- Rumford Chemical Works1
- Rumsey & Company2
- Russ & Burgess1
- Russel Wheeler & Son2
- Russell Manufacturing Co.1
- Rutherford Rubber Company1
- S. B. Chittenden & Co.1
- S. Beach1
- S. D. Kimbark1
- S. Ewart & Co.3
- S. F. Leonard2
- S. F. Wescoat1
- S. G. Nightengale & Childs2
- S. H. & A. Burrows1
- S. H. Clausin & Company1
- S. H. Laney1
- S. H. Ransom & Co.1
- S. Kann1
- S. L. Kirk, Son & Co.1
- S. Mills Ely Co. Importers and Wholesale Grocers1
- S. R. Van Duzer1
- S. S. Pierce Co.1
- S. Wechsler & Bro.1