The ALCO Century 415 was a diesel locomotive of B-B wheel arrangement produced by the American Locomotive Company (ALCO) as part of their Century Series of locomotives.
It was a large switcher or small roadswitcher equipped with a raised cab mounted slightly off-center, with a lower, narrower hood on either side. The longer one contained the diesel engine, a 1500 hp Alco 251-F, while the shorter contained auxiliaries. The C415 could be ordered with three different cab heights; a low one for minimum clearances, a regular height one, and an extra-height one for maximum visibility.
Trucks fitted were either AAR Type B or ALCO Hi-Ad (high adhesion).
The locomotive was not that popular; 26 were built between 1966 and 1968 for seven different owners.