- Sadr, Muqtada
- Salter, Mark
- Samuelson, Steve
- Sanchez, Loretta
- Sanders, Bernard
- Sanders, Bill
- Sanders, Hank
- Sanders, Steven
- Sanderson, Allen
- Sandlin, Max
- Sands, Bobby
- Santorum, Rick
- Sarbanes, John P.
- Sarbanes, Paul
- Sarkozy, Nicolas
- Sawyer, Tom
- Saxton, Jim
- Scalise, Steve
- Scarborough, Joe
- Schaefer, William Donald
- Schafer, Ed
- Schaffer, Bob
- Schauer, Mark
- Schiff, Adam
- Schiff, Adam B.
- Schisler, Kenneth D
- Schmidt, Dave
- Schneider, Michael
- Schneiderman, Eric T
- Schrader, David
- Schultz, Debbie Wasserman
- Schumer, Charles
- Schwab, David
- Schwab, Susan
- Schwartz, Sharon
- Schwarzenegger, Arnold
- Scott, Austin
- Scott, Bobby
- Scott, David
- Scott, Jack
- Sears, Richard
- Sebelius, Kathleen
- Seminerio, Anthony
- Sensenbrenner, F James Jr
- Serrano, Jose
- Sessions, Jeff
- Sexton, Mike
- Sfikas, Perry
- Shanahan, Tom
- Shank, Christopher B.
- Sharif, Nawaz
- Shaw, E Clay Jr
- Shays, Chris
- Shelby, Richard
- Shelley, Kevin
- Sherman, Brad
- Sherwood, Don
- Shields, John
- Shimkus, John
- Shriver, Bobby
- Shriver, Mark K
- Shuster, Bill
- Silver, Sheldon
- Simmons, David
- Simmons, Mark
- Simmons, Rob
- Simpson, James C. Jr
- Singer, William
- Siplin, Gary
- Skeen, Joe
- Skelos, Dean G
- Skelton, Ike
- Slater, Jim
- Sloan, Tom
- Smith, Adam
- Smith, Adrian
- Smith, Bob
- Smith, Brandon
- Smith, Charlie
- Smith, Dale
- Smith, Debbie
- Smith, Gordon
- Smith, Greig
- Smith, John R
- Smith, Leon
- Smith, Lisa
- Smith, Lynn
- Smith, Malcolm A
- Smith, Margaret
- Smith, Mark
- Smith, Matt
- Smith, Nick
- Smith, Patti
- Smith, Paul
- Smith, Robert H
- Smith, Rod
- Smith, Roger
- Smith, Samuel Jr
- Smith, Todd
- Smith, Tom
- Smith, Tommy
- Smith, Vance Jr
- Smith, William J
- Snelling, Richard
- Snowe, Olympia
- Snyder, Mark
- Snyder, Vic
- Sobel, Eleanor
- Solis, Hilda L.
- Sophocleus, Theodore J
- Soto, Cynthia
- Soto, Nell
- Souder, Mark E
- Specter, Arlen
- Speier, Jackie
- Spencer, Terry
- Spitzer, Eliot
- Spota, Thomas
- Spratt, John M Jr
- Spruill, Lionell Sr
- Staback, Edward G
- Stabenow, Debbie
- Stafford, Bill
- Stanley, Paul
- Stavisky, Toby Ann
- Stearns, Cliff
- Steele, Kris
- Steinberg, Darrell
- Stenholm, Charles W
- Stephens, Will Jr
- Stevens, Dan
- Stevens, Gary
- Stevens, John Paul
- Stevens, Ted
- Stevenson, Adlai Ewing
- Stocksdale, Nancy R
- Stoll, Steve
- Stolle, Kenneth W
- Stoltzfus, J Lowell
- Stone, Bernard
- Stone, Jeff
- Stone, Norman R Jr
- Storm, Sue
- Stratton, Jessie G
- Strickland, Ted
- Strickland, Tony
- Stringer, Scott
- Stroger, Todd H.
- Stull, Paul S
- Stump, Bob
- Stupak, Bart
- Sullivan, Dave
- Sullivan, Erin
- Sullivan, John
- Sullivan, Kevin
- Sullivan, Kevin B
- Sununu, John E
- Suozzi, Tom
- Sweeney, Robert K
- Syverson, Dave