| Last Name | First Name | Nickname | City | State | Graduation Year |
|---|---|---|---|---|---|
| Shewchuk | Brian | Sooch | Marietta | Georgia | 1994 |
| Showers | Frederick | Hawley | Pennsylvania | 1960 | |
| Shulkin | Richard | New Windsor | New York | 1960 | |
| Sierzant | Michael | Butchy | Hoschton | Georgia | 1994 |
| Silk | Garry | Slick | Amsterdam | New York | 1970 |
| Sima | Michael | Sima, Zima, Hollywood (for like 2 weeks) | Baldwinsville | New York | 1998 |
| Simpson | Robert | Woodinville | Washington | 1962 | |
| Siniscalchi | Daniel | Dover | Massachusetts | 2000 | |
| Sinisgalli | Allen | Freehold | New Jersey | 1958 | |
| Skelton | Andy | ||||
| Small | William | Evergreen | Colorado | 1988 | |
| Smart | Michael | New Bern | North Carolina | 1966 | |
| Smetana | Gary | "Smut" | Brookline | New Hampshire | 1966 |
| Smith | Timothy | Tim, Faigon or Smithy | The Villages | Florida | 1971 |
| Smith | Dale | Burlington | North Carolina | 1948 | |
| Snyder | Kolbie | Schaghticoke | New York | ||
| Snyder | James | Herbie | Ballston Spa | Connecticut | 1983 |
| Sommers | Daniel | Clifton Park | New York | 1970 | |
| Sommers | Daniel | Clifton Park | New York | 1970 | |
| Sonner | Kevin | Troll | Chaffee | New York | 1998 |
| Spaulding | Peter | Elkhorn | Wisconsin | 1961 | |
| Sperr | John | Williamson | New York | 1984 | |
| Sperr | John | Williamson | New York | 1984 | |
| Squillante | Daniel | Schenectady | New York | 2016 | |
| Stabile | Americus | Wareham | Massachusetts | 1947 |
Omicron Pi Omicron