MSSA
# MSSA

MSSA may refer to:

* Member of the Order of the Star of South Africa
* Methicillin-sensitive Staphylococcus aureus, a subspecies of bacterium
* Military Selective Service Act, a law establishing the current Selective Service System in the United States
* Military-style semi-automatic, a firearm (abbreviation commonly used in New Zealand)
* Mind Sports South Africa
* Montreal Student Space Associations
* MSSA Chemical company, a French chemical company, also known as Métaux Spéciaux
* Master of Science in Social Administration, master's degree from the Mandel School at Case Western Reserve University, equivalent to a master of social work
* Multi-channel/-variate Singular spectrum analysis, an extension of the SSA technique
