Monocacy (Shawnee: Monnockkeseymay) may refer to the Monocacy River in Maryland, USA.
Monocacy may also refer to:
Other streams Little Monocacy River, a tributary of the Potomac River in Maryland Monocacy Creek (Lehigh River tributary), a tributary of the Lehigh River in Pennsylvania Monocacy Creek (Schuylkill River), a tributary of the Schuylkill River in Pennsylvania
Ships USS Monocacy (1864), the first Monocacy, a gunboat launched in, and served until 1903 USS Monocacy (PG-20), the second Monocacy, commissioned in 1914 and decommissioned in 1939 USS Genesee (AT-55), originally the civilian tug Monocacy (1905)
Other Monocacy Aqueduct, crosses the Monocacy River near its mouth Monocacy National Battlefield, memorializing the Battle of Monocacy (1864), fought near the Monocacy River Battle of Monocacy, the July 1864 Civil War battle Monocacy (MARC station) named for the battlefield site Monocacy Station, Pennsylvania, an unincorporated community in Berks County, Pennsylvania Monocacy, Maryland, a former town believed to be located in the vicinity of the Monocacy River
See also Monocracy