SC-9, or variants, may refer to:

 (181711) 1993 SC9 (SC9 of 1993), an asteroid
 SC09, a FIPS 10-4 region code
 SC-09, a subdivision code for the Seychelles, see ISO 3166-2:SC
 Shorts S.C.9, a variation of the English Electric Canberra bomber
 South Carolina Highway 9
 South Carolina's 9th congressional district
 Southern Cross Nine, an Australian television network
 Spooks: Code 9, a British television series