State Route 52 (SR 52) is an east–west state highway that crosses eight counties in northern and northeastern Tennessee. The 141.4-mile-long (227.6 km) route originates in Orlinda along SR 49 and ends in Elgin along U.S. Route 27 (US 27). SR 52 is mostly a primary route, but becomes secondary west of I-65. Between Celina and Livingston it is part of Corridor J of the Appalachian Development Highway System.