War Records: O'Brien
Found 1,738 Civil War soldier records for surname "O'Brien" (Union: 1389, Confederacy: 349).
1,738 Results
| Name | State | Unit | Function |
|---|---|---|---|
| O'Brien, Edward | Michigan | 9th Regiment, Michigan Cavalry | Cavalry |
| O'Brien, Edward | Pennsylvania | 69th Regiment, Pennsylvania Infantry | Infantry |
| O'Brien, Edward | Pennsylvania | 71st Regiment, Pennsylvania Infantry | Infantry |
| O'Brien, Edward | Pennsylvania | 110th Regiment, Pennsylvania Infantry | Infantry |
| O'Brien, Edward | Pennsylvania | 115th Regiment, Pennsylvania Infantry | Infantry |
| O'Brien, Edward | Pennsylvania | 134th Regiment, Pennsylvania Infantry | Infantry |
| O'Brien, Edward | Union Regular Army | US Army (Regular Army) | |
| O'Brien, Edward | New York | 147th Regiment, New York Infantry | Infantry |
| O'Brien, Edward | Kentucky | 5th Regiment, Kentucky Infantry | Infantry |
| O'Brien, Edward | New York | 6th Regiment, New York Cavalry | Cavalry |
| O'Brien, Edward | Massachusetts | 2nd Regiment, Massachusetts Heavy Artillery | Artillery |
| O'Brien, Edward | Massachusetts | 9th Regiment, Massachusetts Infantry | Infantry |
| O'Brien, Edward | Massachusetts | 16th Regiment, Massachusetts Infantry | Infantry |
| O'Brien, Edward | Massachusetts | 48th Regiment, Massachusetts Infantry (Militia) | Infantry |
| O'Brien, Edward | Illinois | 17th Regiment, Illinois Cavalry | Cavalry |
| O'Brien, Edward | Illinois | 23rd Regiment, Illinois Infantry | Infantry |
| O'Brien, Edward | Illinois | 42nd Regiment, Illinois Infantry | Infantry |
| O'Brien, Edward | Minnesota | Brackett's Battalion, Minnesota Cavalry | Cavalry |
| O'Brien, Edward | Connecticut | 1st Regiment, Connecticut Heavy Artillery | Artillery |
| O'Brien, Edward | New Hampshire | 14th Regiment, New Hampshire Infantry | Infantry |
| O'Brien, Edward E. | Wisconsin | 40th Regiment, Wisconsin Infantry (100 days, 1864) | Infantry |
| O'Brien, Enoc | Ohio | 63rd Regiment, Ohio Infantry | Infantry |
| O'Brien, Felix | Vermont | 9th Regiment, Vermont Infantry | Infantry |
| O'Brien, Francis | Maine | 2nd Regiment, Maine Cavalry | Cavalry |
| O'Brien, Francis | Pennsylvania | 81st Regiment, Pennsylvania Infantry | Infantry |
| O'Brien, Francis | New Jersey | 10th Regiment, New Jersey Infantry | Infantry |
| O'Brien, Francis | New York | 1st Regiment, New York Mounted Rifles | |
| O'Brien, Francis | New York | 52nd Regiment, New York Infantry | Infantry |
| O'Brien, Francis | Missouri | 5th Regiment, Missouri Infantry (3 months, 1861) | Infantry |
| O'Brien, Francis B. | Minnesota | 10th Regiment, Minnesota Infantry | Infantry |
| O'Brien, Frank | Connecticut | 1st Regiment, Connecticut Cavalry | Cavalry |
| O'Brien, Frank | Iowa | 8th Regiment, Iowa Infantry | Infantry |
| O'Brien, Frank | Connecticut | 6th Regiment, Connecticut Infantry | Infantry |
| O'Brien, Frank | Maine | 1st Regiment, Maine Heavy Artillery | Artillery |
| O'Brien, Frank | Delaware | 7th Regiment, Delaware Infantry | Infantry |
| O'Brien, Frank | Massachusetts | 33rd Regiment, Massachusetts Infantry | Infantry |
| O'Brien, Franklin | Pennsylvania | 99th Regiment, Pennsylvania Infantry | Infantry |
| O'Brien, Frederick | Kentucky | 6th Regiment, Kentucky Cavalry | Cavalry |
| O'Brien, Frederick | Ohio | 2nd Independent Battery, Ohio Light Artillery | Artillery |
| O'Brien, Frederick | Ohio | 17th Independent Battery, Ohio Light Artillery | Artillery |
| O'Brien, Frederick E. | New Jersey | 33rd Regiment, New Jersey Infantry | Infantry |
| O'Brien, George | New York | 11th Regiment, New York Infantry | Infantry |
| O'Brien, George | Illinois | 88th Regiment, Illinois Infantry | Infantry |
| O'Brien, George | Connecticut | 1st Regiment, Connecticut Cavalry | Cavalry |
| O'Brien, George | Connecticut | 7th Regiment, Connecticut Infantry | Infantry |
| O'Brien, George | Ohio | 1st Regiment, Ohio Heavy Artillery | Artillery |
| O'Brien, George | Kansas | 1st Independent Battery, Kansas Light Artillery | Artillery |
| O'Brien, George | Iowa | 5th Regiment, Iowa Cavalry | Cavalry |
| O'Brien, George | Iowa | 5th Regiment, Iowa Infantry | Infantry |
| O'Brien, George | Connecticut | 2nd Regiment, Connecticut Heavy Artillery | Artillery |
Search External Archives
Search for "O'Brien" on these official military record databases:
NPS Civil War Soldiers & Sailors →
The National Park Service database of Civil War soldiers and sailors. Search for "O'Brien" on the NPS site.
National Archives - Revolutionary War →
Revolutionary War military records from the National Archives, including pension and bounty land warrant files.
FamilySearch - Civil War Records →
Free access to Civil War records including service records, pension files, and draft registration cards.
Fold3 - Military Records →
Extensive collection of military records including Civil War, Revolutionary War, and other conflicts.