Marc
- Apothecaries' system
- M/A/R/C Research
- MARC (archive)
- MARC Cars Australia
- MARC Train
- MARC standards
- MSC Marc
- Marc (TV series)
- Marc (cycling team)
- Marc (given name)
- Marc (surname)
- Marc Marc
- Marc's
- Marcus (disambiguation)
- Mark (disambiguation)
- Marz, Austria
- Massachusetts Animal Rights Coalition
- Matador Automatic Radar Control
- Mid-America Regional Council
- Mid-Atlantic Rowing Conference
- Midwest Association for Race Cars
- Month of March
- Revolutionary Agrarian Movement of the Bolivian Peasantry