Mopac

Mopac has the following meanings:
 * Missouri Pacific Railroad
 * Mopac Expressway, State Highway Loop 1 in Austin, Texas, U.S.
 * MOPAC, a computational chemistry program


 * Mayor's Office for Policing and Crime, a group which oversees the Metropolitan Police in London, U.K.
 * Mountain Pacific Curling Association, a regional curling association in the Western United States