List of highways numbered 424

The following highways are numbered 424:

Canada

 * Manitoba Provincial Road 424

Japan

 * Japanese National Route Sign 0424.svg Japan National Route 424

United States

 * Louisiana 424.svg Louisiana Highway 424
 * MD Route 424.svg Maryland Route 424
 * NY-424.svg New York State Route 424 (former)
 * OH-424.svg Ohio State Route 424 (former)
 * PA-424.svg Pennsylvania Route 424
 * Ellipse sign 424.svg Puerto Rico Highway 424
 * Texas FM 424.svg Farm to Market Road 424