Mispillion River

The Mispillion River is a river flowing to Delaware Bay in southern Delaware in the United States. It is approximately 15 miles (24 km) long and drains an area of 76 square miles (200 km²) on the Atlantic Coastal Plain.

Mispillion River
The Mispillion River in Milford in 2006
Location of the mouth of the Mispillion River
Location
Country	United States
State	Delaware
Counties	Kent Sussex
Physical characteristics
Source	confluence of Beaverdam and Tantrough Branches at Blairs Pond
• location	near Milford
• coordinates	38°52′53″N 75°30′00″W[1]
• elevation	29 ft (8.8 m)[2]
Mouth	Delaware Bay
• location	near Mispillion Light
• coordinates	38°57′05″N 75°18′48″W[1]
• elevation	0 ft (0 m)[1]
Length	15 mi (24 km)approximately[3]
Basin size	76 sq mi (200 km2)[4]
Discharge
• average	91.77 cu ft/s (2.599 m3/s) at mouth with Delaware Bay[5]
Basin features
Progression	Delaware Bay → Atlantic Ocean
River system	Delaware Bay
Tributaries
• left	Beaverdam Branch Lednum Branch Mullet Run Swan Creek Fishing Branch Beaverdam Branch Kings Causeway Branch Crooked Gut
• right	Tantrough Branch Johnson Branch Bowman Branch Deep Branch
Waterbodies	Blairs Pond Griffith Lake Haven Lake Silver Lake

It rises in northern Sussex County, approximately 3 miles (4.8 km) southwest of Milford, and flows generally east-northeastwardly, defining the boundary between Sussex and Kent counties; it passes through the center of Milford on its course to its mouth at Delaware Bay, 16 miles (26 km) northwest of Cape Henlopen.[3][6] The lower 12 miles (19 km) of the river are considered by the U.S. Army Corps of Engineers to be navigable.[7]

A boardwalk known as the Mispillion Riverwalk follows the river in Milford. As of 2003, an effort was underway to preserve a greenway along the river upstream and downstream of Milford.[8]