SSU may refer to:
Universities Sacramento State University, California Salem State University, Massachusetts Salisbury State University, Maryland Samar State University, Philippines Saratov State University, Russia Savannah State University, Georgia Shawnee State University, Ohio Sonoma State University, California Soongsil University, South Korea Southampton Solent University, England Southern States University, California Sri Sai University, India
Science and technology Second, Saybolt universal, a standardised measure of kinematic viscosity Small-subunit ribosomal RNA, as in the SSU rDNA gene or SSU rRNA product (prokaryotic 16S ribosomal RNA, mitochondrial 12S ribosomal RNA, eukaryotic 18S ribosomal RNA) Synchronization Supply Unit, to reduce synchronization problems in digital telecommunications
Security Sanitary Squad Unit, a unit in the United States Army Ambulance Service during World War I Security Service of Ukraine, the main Ukrainian internal security agency Special Security Unit, a specialized unit of the Sindh Police for performing security and counterterrorism functions Strategic Services Unit, a US intelligence organization of the 1940s Special Support Unit, was the police tactical unit of the Royal Ulster Constabulary active during The Troubles. Formed as a replacement to the Special Patrol Group in 1981 and a predecessor of the Headquarters Mobile Support Unit
Other uses Sandiaga Salahuddin Uno, an Indonesian businessman and politician Sony's Spider-Man Universe Southern Sporting Union, an Indian football club in Imphal, Manipur Sudan Socialist Union Swedish Social Democratic Youth League (Swedish Sveriges Socialdemokratiska Ungdomsförbund) Si (surname), Chinese surname, romanized as Ssu in Wade–Giles.