The Marine Corps Security Guard Ribbon is a United States Marine Corps military award that was established by order of Secretary of the Navy John Howard Dalton on 15 July 1997.

The award recognizes those Marine Corps personnel who have served as U.S. Embassy Security Guards and is retroactive to 28 January 1949.

The MCSGR may be awarded retroactively to 28 January 1949, the date the first MSGs departed Washington, DC, for their overseas assignments.

On a case-by-case basis, the MCSGR may be awarded posthumously without regard to period of service.

[4] Personnel transferred early for the Good of the Service must have served a minimum of 12 months in the program to be eligible for this award.