Codorus Creek is a 42.4-mile-long (68.2 km)[1] tributary of the Susquehanna River in York County, Pennsylvania, in the United States.

[2] Codorus Creek (Native American for "rapid water")[2] rises on Beecher Hill in Manheim Township, just 2 miles (3 km) north of the Pennsylvania-Maryland line and the town of Lineboro, Maryland.

[1] The initial stretch of the stream, sometimes known as the West Branch,[3] flows northwest to Menges Mills, then turns northeast and flows past Spring Grove and New Salem to a junction with the South Branch approximately 0.8 miles (1.3 km) upstream of the Pennsylvania Route 182 crossing.

The Army Corps of Engineers Indian Rock Dam, a flood control project, is located approximately 0.7 miles (1.1 km) upstream of the confluence with the South Branch.

Codorus Creek then flows for 15.4 miles (24.8 km)[1] to join the Susquehanna River near the community of Saginaw, passing through the center of the city of York along the way.