Marsh Creek (Monocacy tributary)
General data
- Name: Marsh Creek (Monocacy tributary)
- Water system: Potomac River
- Water type: River
- Progression: Monocacy River -> Potomac River -> Chesapeake Bay -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Marsh Creek is a 26.6-mile-long (42.8 km) tributary of the Monocacy River in south-central Pennsylvania and north-central Maryland in the United States.