F Line

F Line may refer to:


 * F (New York City Subway service)
 * F (Los Angeles Railway), a former rail route in Los Angeles, United States
 * F Line (RTD), a light rail line in Denver, United States
 * F (S-train), an urban rail line in Copenhagen, Denmark
 * F Market & Wharves, the historic streetcar line in San Francisco
 * F (AC Transit), a bus route in the San Francisco Bay Area
 * Line F (Buenos Aires Underground)
 * Metro F Line (Minnesota), a planned bus rapid transit line in Minneapolis–Saint Paul, Minnesota, United States
 * RapidRide F Line, a bus route in King County, Washington, United States