- Sisson, John R.2
- Smith, E. R. (Edgar Russel) (Publisher)2
- Smith, George Girdler, 1795-18782
- Smith, John Calvin2
- Smith, Robert Pearsall, 1827-18982
- Smith, William G. (Surveyor)2
- Somer, J.2
- Sotzmann, D. F.2
- Stanford, Edward, 1827-19042
- Stansbury, Howard, 1806-18632
- State Highway Department2
- Stead, A. D.2
- Stephens, A. D.2
- Stone, William James, 1798-18652
- Stratton, J. F. (Jonathan F.)2
- Stump, Edmund2
- Sveriges geologiska undersoĢkning2
- Switzer, J. E.(Jesse Elmer), cartographer.2
- TacheĢ, A. M2
- Talcott, Andrew, 1797-18832