the passengers who use a given public transportation system, as buses or trains, or the number of such passengers.

Origin of ridership

First recorded in 1965–70; rider + -ship
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ridership

Contemporary Examples of ridership

Word Origin and History for ridership

mid-15c., "position of a rider," from rider + -ship. From 1962 as "number of passengers" (on public transportation, etc.).

Online Etymology Dictionary, © 2010 Douglas Harper