OMAC can refer to:

• OMAC (Buddy Blank), a DC Comics superhero
• OMAC (comics): a fictional organization of powerful cyborgs in comic books published by DC Comics

• The OMAC Project , a comics miniseries featuring with the OMACs
• Michael Costner, the last remaining OMAC cyborg, chronicled in the 2006 OMAC miniseries

• Old Man's Aircraft Company, a business aircraft company which made several prototypes of the Laser 300 plane in the late 1980s and early 1990s
• One-key MAC, a construction in cryptography
• Order of Malta Ambulance Corps, an Irish first-aid organisation linked to the Sovereign Military Order of Malta
• OMAC (Industry Organization): Organization for Machine Automation and Control
• Otherways, Otherways Management Association Club (OMAC), a vanity award organisation

This disambiguation page lists articles associated with the title OMAC.
If an internal link led you here, you may wish to change the link to point directly to the intended article.