HMCS

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