Marshalcy (or occasionally maréchaussée or marechaussee) may refer to:
- The office and rank of a marshal
- Any gendarmerie or military force component with jurisdiction in civil law enforcement
- Maréchaussée, the French Ancien Régime military police force
- Royal Marechaussee, the military police force of the Netherlands
- Maréchaussée (Grimm), the 12th episode of season 4 of the television series Grimm
See also
- Marshalsea, a former prison, London