S
- Sex and Violence in the Media Caucus (2003–)
- Saudi Arabia Study Group, The (2006(?)–)
- Senate Afterschool Caucus (2005-)
- Senate Oceans Caucus (2011-
- Senate Taiwan Caucus (2003-)
- Sexual Assault Violence Elimination (SAVE) Taskforce (2006(?)–)
- Shellfish Caucus (2005–)
- Silk Road Caucus (2001)–)
- Special Operations Forces Caucus (2006(?)–)
- State Maritime Academy Caucus (2006(?)–)
- Stop DUI Caucus (2004-)
- Sudan Caucus (2006(?)–)
- Sustainable Energy and Environment Coalition (SEEC) (2009-)
Read more about this topic: Caucuses Of The United States Congress