Christiana River

Christina River
The Christina River in Wilmington in 2006
Country	United States
States	Pennsylvania, Maryland, Delaware
Tributaries
- left	East Branch Christina River, White Clay Creek, Brandywine Creek
- right	West Branch Christina River
Cities	Newark, DE, Newport, DE, Wilmington, DE
Source
- location	Franklin Township, Chester County, Pennsylvania
- elevation	380 ft (116 m)
- coordinates	39°44′47″N 75°48′53″W / 39.74639°N 75.81472°W / 39.74639; -75.81472
Mouth	Delaware River
- location	Wilmington, New Castle County, Delaware
- elevation	0 ft (0 m)
- coordinates	39°42′57″N 75°30′44″W / 39.71583°N 75.51222°W / 39.71583; -75.51222Coordinates: 39°42′57″N 75°30′44″W / 39.71583°N 75.51222°W / 39.71583; -75.51222
Length	35 mi (56 km) approximately
Basin	565 sq mi (1,463 km2)
Christina River/Brandywine Creek watershed

The Christina River is a tributary of the Delaware River, approximately 35 miles (56 km) long, in northern Delaware in the United States, also flowing through small areas of southeastern Pennsylvania and northeastern Maryland. Near its mouth the river flows past downtown Wilmington, Delaware, forming the city's harbor for traffic on the Delaware River. The Port of Wilmington, opened in 1923 at the river's mouth, handles international cargo and trade.

The river rises in southeastern Pennsylvania, in Franklin Township in southern Chester County, and initially flows southeastwardly, passing through the northeastern extremity of Maryland in northeastern Cecil County, into New Castle County in Delaware, where it flows through western and southern areas of the city of Newark and then turns northeastwardly, passing the town of Newport and approaching Wilmington from the southwest. It receives White Clay Creek from the west near Newport, and Brandywine Creek in Wilmington, approximately 2 miles (3 km) upstream of its mouth.

The Christina River and its tributaries drain an area of 565 square miles (1,463 km²). Brandywine Creek, despite being considered a "tributary" of the Christina, drains 58% of this area (325 mi²/842 km²). White Clay Creek and its tributary, Red Clay Creek, drain a further 28% of the basin (161 mi²/417 km²). Including Brandywine Creek, 71% of the Christina's basin is in Pennsylvania (400 mi²/1,036 km²); 28% is in Delaware (157 mi²/407 km²); and 1% is in Maryland (8 mi²/21 km²). The basin's streams supply approximately 100 million gallons (400 million liters) of water per day for more than half a million people in the three states, providing 75% of the water supply for New Castle County, Delaware, and more than 40% of the water supply for Chester County, Pennsylvania.