Authors: R.
- Sabatini, Rafael 1875-1950
- Sandbach, William R. -
- Sanderson, R. E. (Robert Edward) 1830-1913
- Sandick, R. A. (Rudolf Adriaan) van 1855-1933
- Sayer, Reimunt -
- Schaare, C. R. (Christian Richard) 1893-1980
- Schabelitz, R. F. (Rudolph Frederick) 1884-
- Scharff, R. F. (Robert Francis) 1858-1934
- Schmidt, Walther R. -
- Scholz, R. F. (Richard Frederick) -
- Schoolcraft, Henry Rowe 1793-1864
- Schottenfels, Gertrude R. -
- Scidmore, Eliza Ruhamah 1856-1928
- Scoble, Andrew R. (Andrew Richard), Sir 1831-1916
- Scott-James, R. A. (Rolfe Arnold) 1878-
- Scott, Robert Falcon 1868-1912
- Scott, Robert P. (Robert Pittis) 1852-1918
- Scottron, Samuel Raymond 1841-1908
- Scott, R. S. -
- Scott, William R. (William Rufus) 1886-
- Seaton, R. C. (Robert Cooper) 1853-1915
- Seavey, J. R. 1857-1940
- Seibert, Fred R. -
- Sellars, Roy Wood 1880-1973
- Sempau, Ramón 1871-1909
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