The Admiral was a named passenger train of the Pennsylvania Railroad and its successor Penn Central which operated between Chicago, Illinois and New York City.
[1]: 127 After World War II, the Pennsylvania put the Admiral on a 17-hour schedule between Chicago and New York along with the Broadway Limited, Trail Blazer, General and Pennsylvanian.
[2] At the time the Admiral carried transcontinental sleeping cars which it exchanged in Chicago with the California Zephyr and other California-bound trains.
Mounting losses on its passenger operations led the Pennsylvania to reduce service on the Admiral.
From April 29, 1956, onwards the Admiral operated as a local, making more intermediate stops with a longer overall running time.