| Frank | M | Udall | 42 | OH | INF | A | MUS | Portage |
| Peter | Uffleman | 145 | OH | INF | C | PVT | Delaware | |
| John | Ufford | 6 | IA | INF | CHPL | Delaware | ||
| Pruri | H | Ufhan | 40 | WI | INF | F | PVT | Lucas |
| Joseph | Uhl | 28 | OH | INF | K | PVT | Franklin | |
| Otto | Uhlendorff | 76 | OH | INF | I | SGT | Stark | |
| William | S | Uhler | 178 | OH | INF | E | PVT | Wayne |
| Samuel | Uhler | OH | CAV | B | PVT | Wayne | ||
| Ira | Uhler | 136 | OH | INF | B | 1SGT | Marion | |
| Isaac | Uhlman | 80 | OH | INF | A | CAPT | Stark | |
| Christian | F | Uhrbach | 7th | NY | INF | I | Montgomery | |
| George | Uhrig | 22 | OH | INF | A | SGT | Franklin | |
| Jacob | H | Uhrig | 106 | OH | INF | D | MUS | Ross Co |
| Phillip | Uhrig Sr. | 106 | OH | INF | F | SGT | Ross Co | |
| Jacob | Ulch | 72 | OH | INF | C | PVT | Sandusky | |
| Moses | Ulch | 169 | OH | INF | K | PVT | Sandusky | |
| Hamilton | Ulen | 180 | OH | INF | I | PVT | Ross Co | |
| Leonard | W | Ullery | 8 | OH | LART | INDEPT | Darke | |
| Samuel | Ullery | 110 | OH | INF | G | SGT | Darke | |
| David | G | Ullery | 44 | OH | INF | PVT | Darke | |
| John | Ullom | 4 | WV | INF | G | CPL | Darke | |
| Marcus | Ullom | 156 | OH | INF | B | PVT | Darke | |
| Ellis | Ullom | 110 | OH | INF | H | PVT | Darke | |
| Andrew | W | Ullom | 18 | OH | INF | B | CPL | Athens |
| William | Ullom | 152 | OH | INF | B | PVT | Darke | |
| Joshua | Ullum | 136 | OH | INF | A | PVT | Marion | |
| Wendell | Ulm | 1 | OH | LART | Summit | |||
| Samuel | Ulman | 16 | OH | INF | G | PVT | Wayne | |
| Philip | Ulrich | 9 | OH | INF | C | PVT | Franklin | |
| Richard | M | Ulrich | 14 | OH | INF | I | PVT | Lucas |
| John | Ulrich | 32 | IN | INF | H | PVT | Erie | |
| John | J | Ulsh | 96 | OH | INF | E | CPL | Marion |
| Christopher | Ulyatt | 8th | MI | CAV | G | Montgomery | ||
| Warren | L | Umstead | 107 | OH | INF | A | PVT | Stark |
| William | H | Umstot | 33 | OH | INF | H | 1SGT | Ross Co |
| Theodore | Uncapher | 144 | OH | INF | G | PVT | Wyandot | |
| John | Uncles | 185 | OH | INF | CPL | Franklin | ||
| Arthur | J | Underhill | 162 | OH | INF | C | SGT | Stark |
| Harlow | Underhill | 72 | OH | INF | F | PVT | Sandusky | |
| James | W | Underhill | 3 | OH | CAV | M | PVT | Sandusky |
| Bloomer | D | Underhill | 150 | OH | INF | I | PVT | Wood |
| Aaron | D | Underwood | 23 | OH | INF | F | PVT | Paulding |
| Joseph | C | Underwood | 74 | OH | INF | K | PVT | Franklin |
| Perry | J. | Underwood | 7 | RI | INF | PVT | Hamilton | |
| Thomas | Underwood | 114 | US | CT | C | Greene | ||
| Warren | J | Underwood | 151 | PA | INF | Summit | ||
| George | W | Underwood | 174 | OH | INF | A | PVT | Marion |
| Wright | Underwood | 144 | OH | INF | C | PVT | Wood | |
| William | W | Underwood | 25 | OH | INF | D | PVT | Erie |
| Gideon | D | Underwood | 144 | OH | INF | C | PVT | Wood |
| William | Underwood | 31 | OH | INF | I | PVT | Wood | |
| Robert | Underwood | 86 | OH | INF | D | PVT | Wood | |
| J | Underwood | 24 | OH | INF | Franklin | |||
| Ely | Underwood | 32 | OH | INF | C | CPL | Erie | |
| Simeon | Unger | 162 | OH | INF | H | MUS | Portage | |
| Cyrus | Unger | 123 | OH | INF | Franklin | |||
| Alpheus | Unger | 1 | OH | LART | A | PVT | Portage | |
| August | Unger | 2nd | NJ | INF | B | PVT | Montgomery | |
| Henry | Unger | 72 | OH | INF | I | PVT | Sandusky | |
| George | Unger | 86 | IN | INF | E | PVT | Seneca | |
| Gottleib | Unger | 115 | OH | INF | I | PVT | Columbiana | |
| Christian | Ungericht | 187 | OH | INF | C | PVT | Darke | |
| Martin | Ungley | 136 | NY | INF | C | Franklin | ||
| Joseph | Unhofer | 6th | KY | INF | C | PVT | Montgomery | |
| George | Unkart | 72 | OH | INF | H | PVT | Wood | |
| Alvin | G | Unkefer | 191 | OH | INF | A | 1SGT | Stark |
| John | B | Unkefer | 115 | OH | INF | F | PVT | Stark |
| John | Unkefer | 115 | OH | INF | F | PVT | Stark | |
| Alvin | M | Unkefer | 11 | OH | INF | C | SGT | Stark |
| George | S | Unkel | 120 | OH | INF | E | PVT | Wayne |
| Frederick | Unkenholtz | 120 | NY | INF | E | PVT | Lucas | |
| Unknown | 19 | MI | INF | PVT | Hamilton | |||
| Unknown | 22 | MI | INF | Hamilton | ||||
| Unknown | 23 | MI | INF | Hamilton | ||||
| Soldier | Unknown | 19 | OH | INF | A | Hamilton | ||
| Philip | F | Unser | 195 | OH | INF | B | PVT | Sandusky |
| Daniel | Updegraff | 137 | PA | INF | H | 1SGT | Lucas | |
| William | Updegraff | 195 | OH | INF | B | PVT | Seneca | |
| John | A | Updegraff | 49 | OH | INF | K | CPL | Seneca |
| John | A | Updike | 123 | OH | INF | I | PVT | Wood |
| Lyman | Upham | 4 | MA | INF | D | CPL | Lucas | |
| William | John | Upp | 11 | OH | CAV | G | CPL | Ottawa |
| John | William | Upp | 11 | OH | CAV | G | CPL | Ottawa |
| David | Upson | 171 | OH | INF | E | PVT | Geauga | |
| Horace | W | Upson | 177 | OH | INF | B | MUS | Erie |
| Solomon | Upson | 115 | OH | INF | I | Summit | ||
| George | Upthegrove | 5 | US | CT | G | PVT | Paulding | |
| Jonas | Urban | 104 | OH | INF | A | PVT | Wayne | |
| Joseph | Urban | 64 | OH | INF | G | Summit | ||
| Charles | Urbe | 5th | MI | INF | K | PVT | Montgomery | |
| Adam | Urig | 30 | NJ | INF | H | Stark | ||
| George | D | Urly | 133 | OH | INF | B | PVT | Franklin |
| Abram | C | Urquhardt | 68 | OH | INF | A | 1LT | Henry |
| George | W | Utter | 32 | OH | INF | C | PVT | Lucas |
| George | M | Utter | 187 | OH | INF | F | CPL | Lucas |
| Alexander | R | Utz | 145 | OH | INF | A | PVT | Delaware |
| John | F | Utz | 145 | OH | INF | A | CPL | Delaware |