- Thos. Phillips Co.1
- Tibbals, Shick & Whitehead1
- Tilly Haynes Bro., & Co.1
- Timothy Gay & Co.1
- Tinkham & Co.1
- Titusville Oil Works1
- Toccoa Furniture & Lumber Company1
- Toledo Bending Co.1
- Toledo Pipe Threading Company1
- Tootle, Wheeler & Motter1
- Topeka Bank and Savings Inst.2
- Troy Roller Mills1
- Trus-Con Laboratories2
- Turner Brothers, Bankers2
- Tuttle & Company1
- Twin Falls County1
- Twitchell-Champlin Co.3
- U. T. Hungerford Sales Agent for the Coe Brass Manufacturing Co.1
- U.S. Distilling Co.2
- U.S. Wind Engine & Pump Co.1
- Ulmer Leather Co.1
- Union Adams1
- Union Bag & Paper Co.1
- Union Bank of Winchester1
- Union Depot Hotel1
- Union Hotel1
- Union Insurance Co. of Philadelphia1
- Union Iron Works1
- Union Mercantile Co.1
- Union Pacific Hotel1
- Union Sugar Refinery1
- Union Terminal Cold Storage Co.1
- United Cork Companies2
- United States Family Medicine Depot1
- Universal Crepe & Tissue Mills, Inc.1
- University of Illinois (Urbana-Champaign campus)1
- V. Linn & Son1
- Val. Blatz Brewing Co.1
- Vermont Farm Machine Co.1
- Victor Safe and Lock Co.1
- Vindicator Consolidated Gold Mining Company1
- Vogel Brothers1
- Voss Bros. Mfg. Co.1
- W Bingham Co.1
- W. & B. Douglas1
- W. & H. Walker3
- W. A. Myatt1
- W. A. Wood & Co.1
- W. Auchenbach1
- W. C. Allison & Co.1
- W. C. Graichen Glove Company1
- W. C. Noon & Co.1
- W. D. Parlin1
- W. F. & John Barnes Co.2
- W. F. Whitney Chair Co.1
- W. G. Gage & Co.1
- W. H. C. Riley1
- W. H. Jones & Co.2
- W. H. Sawyer1
- W. J. Holliday & Co.1