L Line

Line L may refer to:
 * L (New York City Subway service), a New York City subway line
 * L-Line (Norfolk Southern), a rail line in North Carolina
 * L Line (RTD), a light rail line in Denver
 * L Taraval, a streetcar line in San Francisco
 * L Line (Los Angeles Metro), a former light rail line in Los Angeles County, California
 * L (Los Angeles Railway), a former streetcar line in Los Angeles