The Flats Industrial Railroad (reporting mark FIR) is a Class III railroad that provides short-line commercial/industrial switching service in Cleveland, Cuyahoga County, Ohio, primarily with CSX Transportation and the Norfolk Southern Railway.

In the 20th century, competition from automobiles, trucks, and buses caused the decline of both freight and passenger service.

They interchange with the Norfolk Southern in a yard between Fulton Road and W.41 Street in Cleveland, Ohio.

[3] In April 2020, the railroad's primary customer, the Grain Craft flour mill on Merwin Avenue, announced it would be closing due to "challenging market dynamics and long-term supply chain obstacles.

[5] In 2005, FIR reported a single Highway-Rail Crossing incident, no other accidents, and no one killed or injured.