HMCS may refer to:
- Her Majesty's Courts Service (2005-11)
- His Majesty's Canadian Ship
- His Majesty's Colonial Ship, see His Majesty's Ship
- Senior Chief Hospital Corpsman, a United States Navy rate
- Hazardous Material Control System (see Workplace Hazardous Materials Information System)
- HMC Investment Securities
- Molybdenum cofactor sulfurtransferase, an enzyme
- High-maltose corn syrup
This disambiguation page lists articles associated with the title HMCS.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: