U.S. Route 30 – 3,073 Miles

Top 10 Longest Highways in the USA – Overview

The USA has lots of long roads and they are divided into two categories interstates and other highways. The USA is a big country and now the US has the longest highway system in the world. Currently, there are 194 active US routes, resulting in a total of 388 endpoints. Here in this table, we have mentioned the longest highways of the USA as mentioned below....

10. U.S. Route 12 – 2,483 Miles

U.S. Route 12 (US 12) spans across the United States as a significant east-west highway, stretching nearly 2,483 miles from Aberdeen, Washington to Detroit, Michigan. Established in 1926, US 12 traverses through Idaho, Montana, the Dakotas, Minnesota, Wisconsin, Illinois, and Indiana. Notably, in Washington alone, US 12 extends for 430.8 miles (693.3 km), ranking as the state’s second-longest highway. Although portions of US 12 have been supplanted by Interstates 90 and 94, it remains vital for local and regional travel networks....

9. I-40 – 2,555 Miles

Interstate 40 (I-40) is a significant east-west highway in the United States, ranking as the third-longest interstate in the country. It spans a distance of 2,555 miles, running from Barstow, California, all the way to Wilmington, North Carolina. Passing through eight states including California, Arizona, New Mexico, Texas, Oklahoma, Arkansas, Tennessee, and North Carolina, I-40 is often referred to as the “King of Trails.” Recognized for its scenic routes and recreational opportunities, I-40 was designated by Congress in the late 1970s as part of the National Parks and Recreational Land system....

8. U.S. Route 2 – 2,580 Miles

U.S. Route 2 (US 2) stretches 2,571 miles (4,138 kilometers) east to west across the northern part of the United States. It’s a significant highway within the United States Numbered Highway System, which organizes roads across the country. The western section of US 2 starts at an interchange with Interstate 5 (I-5) and State Route 529 (Maple Street) in Everett, Washington, and ends at I-75 in St. Ignace, Michigan. On the other hand, the eastern part begins at US 11 in Rouses Point, New York, and ends at I-95 in Houlton, Maine. US 2 holds the distinction of being the northernmost east-west U.S. Highway. Unlike other primary east-west highways, which typically end in zero, US 2 avoids this pattern. Some parts of US 2 in New England were previously known as New England Route 15....

7. U.S. Route 60 – 2,670 Miles

U.S. Route 60 (US 60) is a big highway that goes from Arizona to Virginia, covering about 2,655 miles. It was finished in 1926 and is one of the major routes in the US Highway System. Originally, it was supposed to be called US 62. US 60 takes you through forests, red deserts, and other beautiful landscapes. For more than 40 years, it was a vital road for shipping goods across the country. But now, Interstate 10 (I-10) handles most of that, while State Route 60 (SR-60) remains an important road connecting Los Angeles with the Inland Empire....

6. I-80 – 2,899 Miles

Interstate 80 (I-80) is a super long freeway stretching from San Francisco, California, all the way to Teaneck, New Jersey. It spans about 2,900 miles and was completed in 1956, making it one of the longest highways in the U.S. I-80 passes through four states in the Mid-America Freight Coalition (MAFC): Iowa, Illinois, Indiana, and Ohio. The highest point along I-80 is between Laramie and Cheyenne, reaching 8,640 feet above sea level, making it the highest spot along the entire road....

5. U.S. Route 50 – 3,011 Miles

US Route 50 is a really long road that goes from California to Maryland, cutting through a bunch of states in between. In Nevada, it’s called “The Loneliest Road in America” because it’s not super busy, but there are still cool things to see like national parks, caves, museums, and old railways in towns like Baker, Austin, Dayton, Carson City, and Ely....

4. U.S. Route 30 – 3,073 Miles

US Route 30 (US 30) is a big highway stretching across the U.S. It is about 3,073 miles long and was finished in 1926. In Oregon, it goes from Astoria to the Idaho border near Ontario. In Ohio, it connects with SR 172 and turns into a four-lane highway with restricted access. It also connects with SR 241, giving access to SR 93. In North Central Ohio, the speed limit on US 30 from Bucyrus to Mansfield will be increased to 70 mph....

3. I-90 – 3,102 Miles

Interstate 90 (I-90) is America’s longest highway, spanning 3,102 miles from Seattle, WA to Boston, MA. It crosses diverse landscapes, from the West Coast to the East Coast, passing through states like Washington, Montana, Wisconsin, Illinois, Indiana, Ohio, Pennsylvania, New York, and Massachusetts. Starting in Seattle, it traverses mountains, plains, and urban areas like Chicago and Buffalo, following the path of the old Erie Canal before reaching its endpoint near Logan Airport in Boston....

2. U.S. Route 6 – 3,207 Miles

U.S. Route 6 (US 6) is a long highway that crosses the United States, going from Provincetown, Massachusetts to Bishop, California. It was finished in 1926 and spans 3,207 miles. The highway has changed routes a few times, but from 1936 to 1964, it stretched all the way to Long Beach, California, making it the longest highway in the country during that time....

1. U.S. Route 20 – 3,365 Miles

U.S. Route 20, also known as US Highway 20 (US 20), links the Pacific Northwest with New England and is a significant part of the United States Numbered Highways system. Being numbered with a “0” after the route number, US 20 is recognized as a major coast-to-coast highway. The newer Interstate 90 (I-90) runs roughly alongside the older I-90, which is the longest road in the US, stretching approximately 3,365 miles (5,415 km)....

FAQs – Top 10 Longest Highways in the USA

Which highway is the longest in USA?...