| Schulz, Ronald | Ronald Schulz | Director | 1963 | 1 | |
| Schwartz, Maurice | Maurice Schwartz | Director | 1918 | 1 | |
| Seale, Douglas | Douglas Seale | Director | 1951 - 1971 | 2 | |
| Shaheen, Israfil | Israfil Shaheen | Director | 1998 - 2006 | 3 | |
| Sher, Bartlett | Bartlett Sher | Director | 2003 | 1 | |
| Sherwood, George | George Sherwood | Director | 1966 - 1967 | 2 | 1 |
| Siikala, Kaija | Kaija Siikala | Director | 1969 - 1979 | 2 | |
| Skalski, Stanisław | Stanisław Skalski | Director | 1955 | 1 | |
| Smigiel, Aureliusz | Aureliusz Smigiel | Director | 2000 | 1 | |
| Solgård, Kalle | Kalle Solgård | Director | 1987 | 1 | 1 |
| Spasov, Krassimir | Krassimir Spasov | Director | 2001 | 1 | |
| Stanĕk, Jaromír | Jaromír Stanĕk | Director | 1958 - 1998 | 2 | 1 |
| Stanisławski, Stanisław | Stanisław Stanisławski | Director | 1910 | 1 | |
| Steinkamp, Rainer | Rainer Steinkamp | Director | 1987 | 1 | |
| Stepanian, Aramazd | Aramazd Stepanian | Director | 2007 | 1 | |
| Stern, Edward | Edward Stern | Director | 1981 | 1 | |
| Stettler, Steve | Steve Stettler | Director | 1988 | 1 | 1 |
| Steward, Margaret | Margaret Steward | Director | 2002 | 1 | |
| Stillmark, Alexander | Alexander Stillmark | Director | 1975 - 1993 | 2 | |
| Strehler, Giorgio | Giorgio Strehler | Director | 1949 - 1951 | 2 | 1 |
| Sweet, Bruce | Bruce Sweet | Director | 1979 | 1 | |
| Syxty, Antonio | Antonio Syxty | Director | 2000 - 2006 | 10 | 2 |
| Stabell, Thea | Thea Stabell | Director | 1978 - 2002 | 78 | 1 |
| Sabinskij, Tsjeslav | Tsjeslav Sabinskij | Director | 1917 | 1 | |
| Slotwilski, Jozef | Jozef Slotwilski | Director | 1978 | 1 | |
| Sigurdsson, Thórhallur | Thórhallur Sigurdsson | Director | 1999 | 5 | |
| Skjefstad, Bjørn | Bjørn Skjefstad | Director | 1987 | 1 | 1 |
| Salzer, F. | F. Salzer | Director | 1944 | 1 | |
| Sasaki, Takamaru | Takamaru Sasaki | Director | 1934 | 1 | |
| Stelter, Horst Alexander | Horst Alexander Stelter | Director | 1977 | 1 | |
| Sevy, Bruce K. | Bruce K. Sevy | Director | 2002 | 1 | |
| Soto, Enrique Hernández | Enrique Hernández Soto | Director | 1985 | 1 | |
| Semrád, Vladimír | Vladimír Semrád | Director | 1961 - 1963 | 2 | 1 |
| Seiffer, David A. | David A. Seiffer | Director | 1971 | 1 | |
| Sharrock, Thea | Thea Sharrock | Director | 2003 | 1 | |
| Smuckler, J.L. | J. L. Smuckler (J.L. Smuckler) | Director | 1935 | 1 | |
| Schauwienhold, Friedhelm | Friedhelm Schauwienhold | Director | 1973 - 1980 | 2 | |
| Stockley, Travis L. | Travis L. Stockley | Director | 2001 | 1 | |
| Scott, Jerrold | Jerrold Scott | Director | 2002 | 1 | |
| Svavarsdóttir, Ása Hlín | Ása Hlín Svavarsdóttir | Director | 1993 | 1 | |
| Schwarz, Carl | Carl Schwarz | Director | 1917 | 1 | 1 |
| Stockton Rand, Richard | Richard Stockton Rand | Director | 1999 | 1 | |
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