State Route 255 (SR 255) is a south–north road in Davidson County, Tennessee that connects U.S. Route 31 (US-31) with US-70.

State Route 255 begins by heading east from Franklin Pike as Harding Place to cross Interstate 65 (I-65), Nolensville Pike, and I-24. After I-24, the route curves north as Donelson Pike to reach Murfreesboro Pike. SR 255 provides access to Nashville International Airport. It crosses I-40 and ends in Donelson at Lebanon Pike in a commercial area.

The entire route is in Davidson County.