Leach Creek is a tributary of Leggetts Creek in Lackawanna County, Pennsylvania, in the United States. It is approximately 1.9 miles (3.1 km) long and flows through Scranton. The watershed of the creek has an area of 2.55 square miles (6.6 km2). The creek loses substantial amounts of water to underground mine pools. The creek is in the Coal Region and has been channelized and/or culvertized in some reaches. It flows alongside Pennsylvania Route 307 for a substantial part of its length. The creek has a riparian buffer in its upper and middle reaches, but various invasive plants grow along its banks in its lower reaches.