Stephens Creek, a 2-mile (3 km) tributary of the Willamette River, flows entirely within the city of Portland in the U.S. state of Oregon.

[6] Beginning in the neighborhood of Hillsdale, it runs generally east through residential and commercial neighborhoods as well as patches of forest and parkland to join the Willamette slightly north of the Sellwood Bridge.

[6] Stephens Creek enters the river at Willamette Moorage Park, which is part of a 35-acre (14 ha) group of natural areas called the South Portland Riverbank.

[10] Downstream, the Portland Bureau of Environmental Services and its partners completed work in 2008 to improve habitat for endangered fish species such as Chinook salmon that frequent the creek near its mouth.

[11] Through an innovative pilot project called Green Streets, the headwaters basin of Stephens Creek was improved through the use of bioswales, which are specially engineered ditches on the side of the street, receive rain flowing off the asphalt.