The Indianapolis Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Ohio and Indiana. The line runs from Hamilton, Ohio (north of Cincinnati) west to Indianapolis, Indiana along a former Baltimore and Ohio Railroad line. The east end of the Indianapolis Subdivision is at the end of a branch of the Cincinnati Terminal Subdivision, near the south end of the Toledo Subdivision. Its west end is just east of downtown Indianapolis at the Indianapolis Terminal Subdivision.