As of August 2024, the longest highway in the United States was U.S. Route 20, covering miles from Boston, Massachusetts, to Newport, Oregon. Following in the ranking was U.S. Route 6 spanning miles from Provincetown, Massachusetts to Bishop, California.Â
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HowStuffWorks. (August 25, 2024). Longest highways in the United States as of August 2024 (in miles) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 21, 2026, from /statistics/1494006/longest-highways-us/
HowStuffWorks. "Longest highways in the United States as of August 2024 (in miles)." Chart. August 25, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 21, 2026. /statistics/1494006/longest-highways-us/
HowStuffWorks. (2024). Longest highways in the United States as of August 2024 (in miles). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 21, 2026. /statistics/1494006/longest-highways-us/
HowStuffWorks. "Longest Highways in The United States as of August 2024 (in Miles)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 25 Aug 2024, /statistics/1494006/longest-highways-us/
HowStuffWorks, Longest highways in the United States as of August 2024 (in miles) ÌÇÐÄÆƽâ°æ, /statistics/1494006/longest-highways-us/ (last visited July 21, 2026)
Longest highways in the United States as of August 2024 (in miles) [Graph], HowStuffWorks, August 25, 2024. [Online]. Available: /statistics/1494006/longest-highways-us/
