List of highways numbered 399

The following highways are numbered 399:

Canada

 * Manitoba Provincial Road 399
 * Qc399.svg Quebec Route 399

Japan

 * Japanese National Route Sign 0399.svg Japan National Route 399

United States

 * US 399 (1961 cutout).svg U.S. Route 399 (former)
 * Arkansas 399.svg Arkansas Highway 399
 * Florida 399.svg Florida State Road 399
 * Louisiana 399.svg Louisiana Highway 399
 * Nevada 399.svg Nevada State Route 399
 * NY-399 (1955).svg New York State Route 399
 * Secondary Tennessee 399.svg Tennessee State Route 399
 * Texas Spur 399.svg Texas State Highway Spur 399
 * Virginia 399.svg Virginia State Route 399