- Southeastern Michigan Tourist and Publicity Association1
- Sportsman's County Map Service1
- Steinwehr, A. von (Adolph), 1822-18771
- Stenglein Printing Company1
- Stockslager, S.M.1
- Stratton, J. F. (Jonathan F.),N. Currier (Firm)1
- Surveyor General for Ohio, Indiana and Michigan.1
- Tanner, Henry Schenck1
- Tanner, Henry Schenck, 1786-1858 [sculptor]1
- Tomble, Fremont J., land office manager.1
- Towar, F. M.1
- Tuscola County (Mich.)1
- Tuscola County Road Commission1
- U.S. Lake Survey1
- United States. Bureau of Chemistry and Soils1
- United States. Bureau of Public Roads1
- United States. Surveyor General1
- United States. Topographical Bureau.1
- United States. War Department. Corps of Engineers1
- University of Michigan1