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| Title | Series | Issues | Dates | Notes |
|---|---|---|---|---|
| OMAC | vol. 1 | #1-8 | Sep-Oct 1974-Nov-Dec 1975 | |
| vol. 2 | #1-8 | Sep 2006-Apr 2007 | limited series | |
| #1-7 | Sept 2011-Mar 2012 | |||
| OMAC: One Man Army Corps | #1-4 | 1991 | limited series | |
| The OMAC Project | #1-6 | Jun 2005-Nov 2005 | limited series | |
| OMAC Project: Infinite Crisis Special | #1 | one-shot | ||
| The Omega Men | vol. 1 | #1-38 | Apr 1983-May 1986 | |
| Annual #1, 2 | 1984, 1985 | |||
| Omega Men | vol. 2 | #1-6 | Dec 2006-May 2007 | limited series |
| Oracle: The Cure | #1-3 | May-Jul 2009 | limited series | |
| Orion | #1-25 | Jun 2000-May 2002 | ||
| Our Army at War | #1-301 | Aug 1952-Feb 1977 | became Sgt. Rock | |
| Our Fighting Forces | #1-181 | Oct-Nov 1954-Sep-Oct 1978 | ||
| Outcasts | #1-12 | Oct 1987-Sep 1988 | limited series | |
| The Outlaws | #1-8 | Sep 1991-Apr 1992 | limited series | |
| The Outsiders | vol. 1 | #1-28 | Nov 1985-Feb 1988 | |
| Annual #1 | 1986 | |||
| Special #1 | 1987 | Story concludes in Infinity Inc. Special #1 | ||
| Outsiders | vol. 2 | #1-11, 0, 12-24 | Nov 1993-Nov 1995 | |
| vol. 3 | #1-50 | Aug 2003-Nov 2007 | ||
| vol. 4 | #15-40 | Feb 2009-May 2011 | formerly Batman and the Outsiders (vol. 2) | |
| Outsiders | annual | #1 | 2007 | |
| Outsiders: Five of a Kind-Week 1: Nightwing/Boomerang | One Shot | Oct 2007 | ||
| Outsiders: Five of a Kind: Katana/SHAZAM | One Shot | Oct 2007 | ||
| Outsiders: Five of a Kind-Week 3: Thunder/Martian Manhunter | One Shot | Oct 2007 | ||
| Outsiders: Five of a Kind-Week 4: Metamorpho/Aquaman | One Shot | Oct 2007 | ||
| Outsiders: Five of a Kind-Week 5: Grace/Wonder Woman | One Shot | Oct 2007 | ||
| The Oz-Wonderland War | #1-3 | Jan 1986-Mar 1986 | limited series |
Read more about this topic: List Of DC Comics Publications