King's Highway or Kings Highway may refer to:
Canada
- King's Highways, an alternative designation for the primary provincial highway system in Ontario
- King's Highway (French: Chemin du Roy), part of Route 138 in Quebec
United States
- Kings Highway (Brooklyn), a broad avenue passing through mostly commercial areas in the southern part of Brooklyn
- King's Highway (Charleston to Boston), United States
- (Old) King's Highway (Massachusetts Route 6A), Cape Cod, MA
- (Old) Kings Highway (History of Darien, Connecticut), Darien, CT
- Kings Highway (Virginia State Route 3), central Virginia
- Kings Highway (Virginia State Route 125), Suffolk, Virginia
- Kings Highway (New Jersey Route 27), northern New Jersey
- Kings Highway (today County Route 13 (Rockland County, New York)), a major route through Valley Cottage, New York
- Kings Highway (today Farm to Market Road 989), in Bowie County, Texas
- Kings Highway (today Pennsylvania Route 143), in eastern Pennsylvania
- Kings Highway (today U.S. Route 61), the trail following the Mississippi River northward from New Orleans, Louisiana, through New Madrid, Sikeston, Cape Girardeau, Perryville, and St. Louis, Missouri