Racket Brook is a tributary of the Lackawanna River in Wayne County and Lackawanna County, in Pennsylvania, in the United States. It is approximately 3.6 miles (5.8 km) long and flows through Canaan Township in Wayne County and Carbondale Township and Carbondale in Lackawanna County. The watershed of the stream has an area of 5.29 square miles (13.7 km2). The stream has no named tributaries, but has two unnamed tributaries. It is not designated as impaired, but it does experience minor flow loss. It drains part of the Moosic Mountains and also flows through a ravine known as the Brownell Ravine.