Alaska Railroad 557 is an S160 class 2-8-0 "Consolidation" type steam locomotive built in 1944 by the Baldwin Locomotive Works for the U.S. Army Transportation Corps during World War II. It was subsequently transferred to the Alaska Railroad to pull freight trains, maintenance trains, and occasional passenger trains throughout the state of Alaska. It was the last steam locomotive to be removed from service on the railroad before it was sold to Monte Holm, who moved it to Everett, Washington as a static display piece. No. 557 returned to Alaska in January 2012, and as of 2022, it is undergoing a rebuild to operate on the Alaska Railroad.