Lake Pontchartrain Causeway one of the Longest Bridge in the US


The United States of America houses numerous bridges connecting several Islands with the mainland or two places where there is a gap in between. These bridges are works of architectural brilliance and engineering prowess displayed on a large water body. In respect to this, it is not surprising to see that the country boast of some of the Longest Bridges in the World. Thus we have taken to the task to unveil the Longest Bridges in the US, particularly the top 10 listing and brief information about them.


It is a known owing to the fact that vast landmass the United States of America covers, there are lots of bridges in the country. Out of the numerous bridges built in the country, the following bridges highlighted below have identified to be outstanding for its stunning length. Without much deliberation, we present you with the top 10 Longest Bridge in the US.

    1. Lake Pontchartrain Causeway, Louisiana
    2. Manchac Swamp Bridge, Louisiana
    3. Atchafalaya Basin Bridge, Louisiana
    4. Chesapeake Bay Bridge-Tunnel, Virginia
    5. Bonnet Carré Spillway Bridge, Louisiana
    6. San Mateo–Hayward Bridge, California
    7. Seven Mile Bridge, Florida
    8. General W.K. Wilson Jr. Bridge, Alabama
    9. Virginia Dare Memorial Bridge, North Carolina
  1. The Chesapeake Bay Bridge, Maryland

Those are the longest bridge in the country. So you can make do of this list, especially if you are eager to drive along with these lengthy and giant construction made by man. Below is brief information about these bridges.

Top 10 Longest Bridge in America

#1. Lake Pontchartrain Causeway

Location: Louisiana

Length: 24 miles

The Longest Bridge in America is Lake Pontchartrain Causeway which is also ascribed to be the Longest Bridge in Louisiana. The Bridge’s construction kicked off in 1955 and was opened in 1956, and it is constructed in two parallel bridges crossing the Lake Pontchartrain in southern Louisiana, United States. However, the longer of the two bridges is measured at 23.83 miles long. With a total length of 38.5 km, this bridge is one of the ten longest bridges to drive across and among the Longest Bridges in the World over Water.

#2. Manchac Swamp Bridge

Location: Louisiana

Length: 23 miles

Manchac Swamp Bridge
Manchac Swamp Bridge

With just a slight difference of about 1.5 km, Manchac Swamp Bridge occupies the second spot as the longest bridge in the US. The bridge is also constructed in two parallel bridges crossing in the United States of Louisiana. Also, the bridge is recognized as one of the Longest Bridges in the World over Water and at the same time the longest bridge on the Interstate Highway System. Also, the bridge is said to be the longest toll-free road bridge in the world.

#3. Atchafalaya Basin Bridge

Location: Louisiana

Length: 29 Kilometers

The third longest bridge in the United States is not found anywhere else but still in the United States of Louisiana. The Atchafalaya Basin Bridge is famously known as the Louisiana Airborne Memorial Bridge, twin crossing parallel bridges carrying Interstate 10 over the Atchafalaya Basin and it has two exits: one for Whiskey Bay and the other for Butte La Rose. However, the exits are designed in such a way that it merges hen crossing the Whiskey Bay Pilot Channel and the Atchafalaya River. The bridge was opened in 1973, and it links Lafayette and Baton Rouge. Its location over the Atchafalaya Basin, which is the largest wetland in the country, gave this bridge its current name.

#4. Chesapeake Bay Bridge-Tunnel

Location: Virginia

Length: 17.6 Miles

Chesapeake Bay Bridge-Tunnel in Virginia takes us out of Louisiana occupying the fourth spot on our list of Longest Bridges in the US. The bridge opened in 1964, and it is a combination of bridge and tunnel crossing at the mouth of the Chesapeake Bay, the Hampton Roads harbor, as well as the proximate entrances of the James and Elizabeth Rivers in Virginia.  The bridge design includes 12 miles of low-level support bridge, two one-mile-long tunnels, two high bridges, two miles of causeway, and four human-made islands. This bridge is not just among the longest bridges in the country but one of the wonders of humanmade.

#5. Bonnet Carré Spillway Bridge

Location: Louisiana

Length: 11 miles

Going back to Louisiana, we find the Bonnet Carré Spillway Bridge; the twin concrete trestle bridge has four lanes of interstate I-10 of Louisiana with crossing the Bonnet Carré among the longest bridges in the country. The bridge is constructed on the spillway designed to helps get the flood water into the lake to prevent nearby New Orleans metropolitan area from been flooded by the Mississippi River. The bridge is highly trailed by many motorists on daily occasion, making it one of the commonly traveled bridges in the country.

#6. San Mateo–Hayward Bridge

Location:  California

Length: 11 km

Taking us further is the San Mateo – Hayward Bridge in California, famous for its outstanding architectural and engineering brilliance. The bridge is rated as the longest bridge in California offers a picturesque scenic view of the San Francisco Bay. It was originally opened in 1929 but underwent reconstruction giving it its current structure was completed in 1967. The bridge is designed in such that transport ships to pass under it without interrupting the traffic, and it connects Foster City (in San Mateo) to Hayward.

#7. Seven Mile Bridge

Location: Florida

Length: 6.7 miles

Seven Mile Bridge in the United States of Florida produced the seventh longest bridge in the United States. It is a famous bridge having been featured in several movies, especially 2 Fast 2 Furious. The bridge serves as a linkage for Knight’s Key in the Middle Keys to Little Duck Key in the Lower Keys of Florida. The bridge is in two compartments; the newer bridge serves vehicles and traffic while the older bridge serves only cyclists and pedestrians.

#8. General W.K. Wilson Jr. Bridge

Location: Alabama

Length: 6 miles

Gradually getting to the end of our discourse, we move over to Alabama, where General W.K. Wilson Jr. The bridge is constructed as a double parallel crossing tied through arches of weathering steel and beam viaducts of concrete that form one continuous span carrying four lanes of Interstate 65 across the Mobile-Tensaw from the county of Mobile, Alabama and Baldwin County, of Mobile, in the United States of Alabama. The bridge comprises of four lanes of the Interstate-65 over it, as well as a picturesque of the River Delta and the large body of green wetlands that surrounds it.

#9. Virginia Dare Memorial Bridge

Location: North Carolina

Length: 5 miles

Virginia Dare Memorial Bridge is a four-lane automobile bridge in Dare County, North Carolina. The bridge spans across the Croatan Sound carrying the Route-64 and connects through Manns Harbor and Roanoke Island, in Dare County. The bridge is entirely located over water with no land in sight on either side. The bridge was built to connect the mainland of Manns Harbor to Manteo on Roanoke Island. Compared to other bridges listed earlier, Virginia Dare Memorial Bridge is not a popular trail road and does not experience heavy traffic due to sparse transportation.

#10. The Chesapeake Bay Bridge

Location: Maryland

Length: 4.3 miles

Last on our list of Longest Bridge in the US is the Chesapeake Bay Bridge in Maryland. The bridge is popularly known as the “Bay Bridge” by residents. The bridge serves as the linking point between the rural Eastern Shore with the urban Western Shore region of Maryland. The bridge was a onetime longest continuous over-water steel structure in the world when it was opened in 1952. Nonetheless, the bridge still serves an important purpose and still connects numerous travelers traveling from cross-country US Route 50, and links various tourist destinations along the way.

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Conclusion on the Longest Bridge in the America Top 10 Listing

I believe you are now acquainted with the top longest bridges in the USA which are a wonder to behold. The bridges all serve their purpose and are still relevant routes to pass through till date except for Virginia Dare Memorial Bridge. From our listing, we saw that the majority of the longest bridges in the United States are found in Louisiana. A reasonable reason many of the longest bridges, flying over those swamps is because the state is formed with areas surrounding marshes as well as the Mississippi River. More so, majority of these bridges are constructed over waterways and as such is considered as “bridges over water.” You can make out time to journey across any of these bridges, especially the top three of them.

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