| NAME | RANK | COMPANY - UNIT | CEMETERY (Section) |
|---|---|---|---|
| O'Brian,
John (ca1841- ) |
Pvt | D - 90 IL US Infantry | |
| O'Brine,
Peter (ca1834- ) |
2 Lt | D - 90 IL US Infantry | |
| O'Connell,
John (ca1823- ) |
Pvt | G - 42 IL US Infantry | |
| O'Connor,
David (ca1837- ) |
Major | HQ - 90 IL US Infantry | |
| O'Connor,
Dennis (ca1831- ) |
Pvt |
B - 3 IL US Cavalry Consolidated | |
| O'Hare
Michael (ca1828- ) |
Pvt | D - 4 IL US Cavalry | |
| O'Neal,
Michael (ca1844- ) |
Pvt | E - 10 IL US Cavalry Consolidated | |
| O'Riley, Daniel (ca1828-1864) | Pvt | G - 64 IL US Infantry | |
| Oliver, John
(ca1841- ) |
Pvt | D - 90 IL US Infantry | |
| Oliver, Stephen A. (1838-1910) | Cpl | D - 8th Infantry
Regiment MA |
Elmhurst, Joliet, IL
(Ridgeland) |
| Olin, Benjamin (1836-1920) | 1 Lt | 20 IL US Infantry | Oakwood, Joliet, IL |
| Olmstead,
Henry (ca1836- ) |
Pvt | F - 66 IL US Infantry | |
| Orker, John (ca1827-
) |
Pvt | D - 90 IL US Infantry | |
| Osgood,
Augustus A.
(ca1838- ) |
1 Lt | B - 100 IL US Infantry | |
| Osman, William E. (1829-1903) | Regimental Blacksmith |
H - 100 IL US Infantry |
|
| Osterman,
Henry (ca1826- ) |
Pvt | B - 20 IL US Infantry | |
| Otto,
Frederick (ca1839- ) |
Pvt | E - 100 IL US Infantry | |
| Otta/Otto, Lewis
(ca1833- ) |
Pvt | F - 20 IL US Infantry | |
| Overnan,
William (ca1832- ) |
Pvt | K - 100 IL US Infantry | |
| Owens,
Philip (ca1819-1878) |
Musician | D - 90 IL US Infantry | Wood National Cemetery Milwaukee, WI |