SPAG

SPAG or Spag may refer to:


 * Submarine Parachute Assistance Group of Britain's Royal Navy, assists in submarine rescues
 * Anthony "Spag" Borgatti (1916–1996), founder of Spag's discount store in Massachusetts
 * St. Petersburg Immobilien und Beteiligungs AG (SPAG), a company suspected of links with the Cali Cartel organised crime group
 * Spelling, punctuation and grammar
 * Sperm-associated antigen, human proteins, including:
 * SPAG1: Sperm-associated antigen 1
 * SPAG5: Sperm-associated antigen 5
 * SPAG6: Sperm-associated antigen 6
 * SPAG7: Sperm-associated antigen 7
 * SPAG8: Sperm-associated antigen 8
 * SPAG9: Sperm-associated antigen 9
 * SPAG11B: Sperm-associated antigen 11B