The Lynx Blue Line is a light rail line in Charlotte, North Carolina, United States. Opened in 2007, it was the first rail line of the Charlotte Area Transit System, and the first major rapid rail service of any kind in the state. The 26-station, 19.3-mile (31.1 km) line extends from its northern terminus at the University of North Carolina at Charlotte in University City through NoDa, Uptown, and South End, then runs along South Boulevard to its southern terminus just north of Interstate 485 at the Pineville city limits. The line carries an average of over 27,700 passenger trips every day and offers connections to the CATS' CityLynx Gold Line which opened in 2015.

The Charlotte Area Transit System (CATS) is the agency responsible for public transportation in the Charlotte metropolitan area. CATS operates bus and rail transit services in Mecklenburg County and surrounding areas. Established in 1999, CATS' bus and rail operations carry about 320,000 riders on an average week. CATS is governed by the Metropolitan Transit Commission and is operated as a department of the City of Charlotte. In 2023, the system had a ridership of 13,476,600, or about 42,600 per weekday as of the fourth quarter of 2023.