Shiawassee River

Shiawassee River
Physical characteristics
Source 
 • locationSpringfield Township, Oakland County, Michigan
 • coordinates42°43′51″N 83°30′39″W / 42.73086°N 83.51077°W / 42.73086; -83.51077
Mouth 
 • location
Saginaw River, Michigan
 • coordinates
43°23′13″N 83°57′58″W / 43.38697°N 83.96608°W / 43.38697; -83.96608
Length110 mi (180 km)
Basin size1,201 mi2 (3,110 km2)
Discharge 
 • locationmouth
 • average2,639.68 cu ft/s (74.747 m3/s) (estimate)

The Shiawassee River (/ˌʃəˈwɒsi/ SHY-ə-WOSS-ee) in the U.S. state of Michigan drains an area of 1,201 square miles (3,110 km2) within Oakland, Genesee, Livingston, Shiawassee, Midland and Saginaw counties. It flows in a generally northerly direction for approximately 110 miles (180 km) from its source to its confluence with the Tittabawassee River creating the Saginaw River, which drains into Saginaw Bay of Lake Huron.

The name is derived from the Chippewa "Gwayak-waasizo" meaning "the straight ahead & shining or sparkling river."