The GE C44-9W was a 4,400 hp (3,267 kW) diesel locomotive built by GE Transportation Systems of Erie, Pennsylvania. The design has proved popular with North American railroads. Because of more stringent emissions requirements that came into effect in the United States on January 1, 2005, the Dash 9-44CW has been replaced by the GE ES44DC.

Many North American railroads have ordered the C44-9W. Originally ordering them included Chicago & North Western Railway, Santa Fe, BNSF, CSX, Southern Pacific, Canadian National Railway, BC Rail, and Union Pacific Railroad. Norfolk Southern purchased Dash 9s, however they are Dash 9-40CW. The Dash 9 is used in the Microsoft Train Simulator (Also known as MSTS) along with other BNSF locomotives.