- Shockley, Ernest V. (Ernest Vivian),1878-19241
- Siebenthal, C. E.(Claude Ellsworth), 1869-1930, cartographer.1
- Simmons, C. S. (Charles Shaffer),1900-cartographer.1
- Slipher, J. A.1
- Smith, Ansel R.1
- Smith, William, Lieutenant1
- Snider, Luther C. (Luther Crocker),1882-19471
- Sowder, Kimberly H.1
- Standard Oil Company (Indiana)1
- Stapleton, John T., cartographer.1
- Stevens, E. H. (Edmund H.),1892-cartographer.1
- Strong, Ezra Baldwin, 1805-18461
- Swinehart, C. V., cartographer.1
- Switzer, J. E. (Jesse Elmer)1
- Talcott, Andrew, 1797-18831
- Tanner, Henry Schenck, 1786-1858 [sculptor]1
- Tarrance, James1
- Tharp, W. E. (William Edgar),surveyor.1
- Thompson, Todd A.(Todd Alan), 1959-cartographer.1
- Titus, Wm. J., cartographer.1