Belle of Louisville is a steamboat owned and operated by the city of Louisville, Kentucky, and moored at its downtown wharf next to the Riverfront Plaza/Belvedere during its annual operational period. The steamboat claims itself the "most widely traveled river steamboat in American history." Belle of Louisville's offices are aboard Mayor Andrew Broaddus, and also appears on the list of National Historic Landmarks.

A steamboat is a boat that is propelled primarily by steam power, typically driving propellers or paddlewheels. Steamboats sometimes use the prefix designation SS, S.S. or S/S or PS ; however, these designations are most often used for steamships.