| NAME | COMPANY | RANK | |
| Sackrider George W. | Company I | 3rd Sergeant | |
| Safley John W. | Company B | (not given) | |
| Safley Robert | Company C | (not given) | |
| Sanders Simeon J. | Company B | (not given) | |
| Sandford Henry E. | Company G | 6th Corporal | |
| Sawyer Andrew J. | Company D | (not given) | |
| Sawyer Eli | Company K | 8th Corporal | |
| Scofield Alfred J. | Company A | 2nd Sergeant | |
| Scott Anderson J. | Company C | 1st Lieutenant | |
| Scott George M. | Company D | 1 Sergeant | |
| Scott Henry W. W. | Company B | (not given) | |
| Scott Robert G. | Company B | (not given) | |
| Seeber Jacob W. | Company A | (not given) | |
| Seeber Michael | Company A | 4th Sergeant | |
| Seeber William A. | Company A | 5th Corporal | |
| Seeley John | Company I | 5th Sergeant | |
| Selby James H. | Company G | 4th Corporal | |
| Selby William A. | Company G | (not given) | |
| Senate John | Company B | (not given) | |
| Sennett Thomas | Company K | (not given) | |
| Serbe John | Company D | (not given) | |
| Seright Andrew M. | Company F | (not given) | |
| Serrin John R. | Company E | 3rd Corporal | |
| Shane Martin S. | Company E | Drummer | |
| Shanklin James H. | Company H | 7th Corporal | |
| Shattock Benjamin L. | Company K | (not given) | |
| Sheets Joseph | Company I | (not given) | |
| Sheets Joseph C. | Company B | (not given) | |
| Sheldenhelm John N. | Company E | (not given) | |
| Sheldon Edmund M. | Company C | (not given) | |
| Sheldon Francis L. | Company C | 2nd Lieutenant | |
| Sheldon John N. | Company E | 6th Corporal | |
| Shelley Richard T. | Company E | 3rd Corporal | |
| Shintaffer Isaac | Company B | (not given) | |
| Shropshire John | Company B | (not given) | |
| Simmons Coleman | Company B | (not given) | |
| Simmons Samuel W. | Company C | 8th Corporal | |
| Simmons Stephen | Company C | (not given) | |
| Sims Thomas L. | Company D | (not given) | |
| Simson Eastman H. | Company H | (not given) | |
| Sines Absalom | Company G | 4th Sergeant | |
| Sinkey Franklin | Company K | (not given) | |
| Sisson Loren | Company H | (not given) | |
| Sizer George | Company A | 5th Sergeant | |
| Sizer Robert | Company A | (not given) | |
| Skaife John G. | Company I | (not given) | |
| Skinner Elias | Field and Staff | Chaplain | |
| Slater Jacob | Company B | (not given) | |
| Slife James | Company G | (not given) | |
| Sloan James | Company K | 2nd Corporal | |
| Sloan Josiah W. | Company K | (not given) | |
| Smith Amadee M. | Company F | 2nd Corporal | |
| Smith Francis | Company H | (not given) | |
| Smith George S. | Company F | (not given) | |
| Smith Irenius | Company D | (not given) | |
| Smith James | Company B | (not given) | |
| Smith James C. | Company I | (not given) | |
| Smith Jeremiah B. | Company I | (not given) | |
| Smith John G. | Company D | (not given) | |
| Smith John G. | Company K | (not given) | |
| Smith Riley | Company H | (not given) | |
| Smith Rudolph | Company A | (not given) | |
| Smith Thaddeus L. | Company F | 2nd Lieutenant | |
| Smith William W. | Company G | Captain | |
| Smith William W. | Company G | 1st Lieutenant | |
| Smithson Walter | Company G | (not given) | |
| Smouse James H. | Company G | Wagoner | |
| Smouse William H. | Company G | Adjutant | |
| Snow James Mortime | Company E | (not given) | |
| Soaper Andrew | Company B | (not given) | |
| Soesbe William | Company B | (not given) | |
| Sones George W. | Company K | (not given) | |
| Southern William H. | Company C | (not given) | |
| Speer Johnson | Company B | 2nd Corporal | |
| Spencer James | Company K | (not given) | |
| Spencer John E. | Company D | 8th Corporal | |
| Spillman Sooter | Company D | (not given) | |
| Sprague Austin G. | Company D | (not given) | |
| Stallcop Charles W. | Company A | (not given) | |
| Stanfield Levi S. | Company H | 4th Corporal | |
| Stanfield Samuel V. | Company H | (not given) | |
| Stanton James | Company I | (not given) | |
| Starr John C. | Company B | (not given) | |
| Starr Samuel J. | Non- Commissioned | StaHospital Steward |
|
| Steinberger David | Company D | (not given) | |
| Stephens Amos S. | Company H | (not given) | |
| Stephens Henry H. | Company H | (not given) | |
| Stephenson James | Company F | (not given) | |
| Stevens Leslie | Company A | (not given) | |
| Stewart Clark H. | Company D | (not given) | |
| Stewart Robert B. | Company F | 5th Sergeant | |
| Steward Francis M. | Company B | (not given) | |
| Steward William | Company H | (not given) | |
| Steward William C. | Company F | 5th Sergeant | |
| Stinger Andrew F. | Company F | (not given) | |
| Stinger Theodore | Company F | (not given) | |
| Stoddard George H. | Company E | 2nd Corporal | |
| Stoner Abram B. | Company I | 2nd Corporal | |
| Storey Amos | Company C | (not given) | |
| Stover William | Company I | (not given) | |
| Stratton Theodore | Company B | (not given) | |
| Strawhicker John | Company C | (not given) | |
| Stream Mahlon B. | Company G | (not given) | |
| Stream William C. | Company G | 4th Sergeant | |
| Streeter Justus L. | Company G | (not given) | |
| Streit Levi | Company H | (not given) | |
| Streit Silas P. | Company H | (not given) | |
| Strong James W. Lin | Company E | 1st Lieutenant | |
| Sturm John | Company A | (not given) | |
| Sutton Sylvester W. | Company B | (not given) | |
| Swab William Oscar | Company D | (not given) | |
| Swafford Jeremiah B. | Company D | 1st Lieutenant | |
| Swaney John | Company E | (not given) | |
| Swarthout Aaron A | Company E | (not given) | |
| Sweet Deloss | Company I | (not given) | |
| Sweet Robert B. | Company H | Drummer | |
| Swoyer Henry W. | Company I | 7th Corporal |
