What Is the Longest Bridge In the United States and How Long Is the Lake Pontchartrain Causeway?

The longest bridge in the United States is also the longest over-water bridge in the world: the 24-mile (38-km) long Lake Pontchartrain Causeway near New Orleans, Louisiana.

The Verrazano Narrows Bridge in New York City is the longest suspension bridge in the United States, with a span of 4,260 feet (1,298 m).

Close behind is San Francisco’s Golden Gate Bridge, with a span of 4,200 feet (1,219 m).

Those two bridges are the sixth and seventh-longest suspension bridges in the world; Japan, Denmark, England, and China have longer ones.

The Mackinac Straits suspension bridge in Michigan is the ninth-longest suspension bridge in the world and the third-longest in the United States, at 3,800 feet (1,158 m).

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