A bridge has so much meaning to human beings. Not just a symbol of connection, the bridge contributed hugely to the development of life. Nowadays, it’s not only significant in terms of traffic and economy, but the bridges also have a unique design, which attracts millions of tourists every year. They might be the most significant landmarks that you can check-in when visiting the places. Let’s follow The Broad Life to explore the longest sea bridges in the world!

1. Hong Kong–Zhuhai–Macau Bridge

Hong Kong–Zhuhai–Macau Bridge is now the longest sea bridge in the world
Hong Kong–Zhuhai–Macau Bridge is now the longest sea bridge in the world.

After its completion in 2018, Hong Kong-Zhuhai-Macau Bridge (HZMB) is considered the longest sea bridge in the world. The total length of the HZMB is about 55km, which is 20 times longer than the famous Golden Gate Bridge in San Francisco, USA. The bridge consists of 3 cable car bridges, 2 artificial islands with an area of ​​100,000 m2 each, and a sea tunnel of 6.7km long. Especially, this superstructure is able to withstand earthquakes of magnitude 8, and super typhoons up to level 16. Even, it still stands strong if a heavy cargo ship directly hits it.

In construction, the bridge also requires 1.08 million m3 of cement and 400,000 tons of steel. It’s 4.5 times more than the material used to create the Golden Gate Bridge in San Francisco, USA. It’s also enough to build the 60 Eiffel Towers in France.

2. Jiaozhou Bay Bridge – Qingdao, China

The Jiaozhou Bay Bridge in China one of the longest sea bridges in the world
The Jiaozhou Bay Bridge in China.

With a length of 41.58km including 6 lanes, Jiaozhou Bay Bridge was recognized by Guinness as the longest sea-crossing bridge in the world by total length in 2012. In detail, the bridge has 5,200 pillars and uses 450,000 tons of steel that can withstand magnitude 8 earthquakes.

3. Lake Pontchartrain Causeway – Louisiana​, USA

the lake pontchartrain causeway in louisiana
The Lake Pontchartrain Causeway in Louisiana.

Lake Pontchartrain Expressway Bridge is a bridge spanning Lake Pontchartrain with a length of 38.44km, connecting the city of Metairie and the district of St. Tammany. The bridge was confirmed by Guinness as the longest continuous bridge on the water in the world in 1969. In addition to facilitating convenient transportation, this is also a famous tourist destination.

4. Donghai Bridge – Zhoushan, China

Donghai Bridge in zhoushan china
Donghai Bridge construction started on Jun 26, 2002.

Completed in 2005, Dong Hai Bridge is the first sea-crossing bridge in China with a length of 32.5km including 6 lanes. Stretching across the East China Sea, connecting Shanghai with the Yangshan deep-water port, the bridge has great significance in serving China’s land-sea trade.

5. King Fahd Causeway – Khobar, Saudi Arabia and Al Jasra, Bahrain

picture of king fahd causeway, one of the longest sea bridges in the world
A picture of King Fahd Causeway, one of the longest sea bridges in the world.

In order to promote trade exchanges and tighten diplomatic relations, the King Fahd Causeway Bridge connects Saudi Arabia with the island nation of Bahrain. The $1.2 billion project was launched to the public in 1986 with a total length of up to 25km including 4 lanes. Every day, an average of more than 45,000 vehicles pass through here.

6. Vasco Da Gama Bridge – Lisboa, Portugal

vasco da gama bridge longest in europe
Vasco Da Gama Bridge longest in Europe.

Named after the famous 15th-century explorer, Vasco Da Gama is Europe’s longest bridge with a total length of more than 17km. With a cost of up to one billion USD, the bridge is an important traffic route, connecting the two South – North of Portugal.

7. San Francisco – Oakland Bay Bridge – Oakland, USA

san francisco oakland bay bridge at night
San Francisco – Oakland Bay Bridge at night.

Inaugurated in 1936, it spans more than 13.4km, connecting the two cities of San Francisco and Oakland. The highest point of the bridge is the 160m high tower shaft, white, shining every night with a system of shimmering lights.

8. Seven Mile Bridge – Florida, USA

seven mile bridge overseas hwy
Seven Mile Bridge is a part of the Overseas Highway.

Is an iconic bridge in Florida, stretching to the sea, connecting the Gulf of Mexico and the state of Florida. Completed in 1982, the bridge is more than 10km long. With stunning ocean views, the Seven Mile Bridge is not only one of the longest bridges in the United States, but also a fascinating sight.

9. Øresund Bridge – Copenhagen, Denmark and Malmö, Sweden

best view of oresund bridge one of the longest sea bridges in the world
The best view of Oresund bridge from an airplane.

Located across the Oresund Strait in the southernmost part of Sweden and Denmark. Designed by George K.S. Rotne, Oresund Bridge is a unique combination of an 8km long cable-stayed bridge and a 4km long undersea tunnel. Viewed from above, the bridge seems to be only half, located in the heart of the vast ocean, creating a wonderful scene.

10. Mackinac Bridge – Michigan, USA

mackinac bridge at night
Mackinac Bridge at night.

One of the most famous and historically significant bridges in America, the Mackinac Bridge spans 8 kilometers. This is the 3rd longest suspension bridge in the US and the 2nd longest suspension span in North America. Mackinac Bridge is not only a freight route but also a place that attracts tourists and photographers from all over the world.

Extra. Golden Gate Bridge – California, USA

best view of golden gate bridge
The best view of the Golden Gate Bridge in California.

The Golden Gate Bridge used to be on the list of the world’s 10 longest sea bridges until HZMB’s completion in 2018. Considered a symbol of the city of San Francisco, the Golden Bridge was inaugurated in 1937, stretching for more than 2.7km. The bridge is made from steel with a weight of more than 80 tons. With unique architecture, the bridge is one of the architectural works in the US that attracts millions of tourists every year.

A Quick Sum Up of the World’s Longest Sea Bridges

#Bridge NameCompletion YearTotal Length (km)
1Hong Kong–Zhuhai–Macau Bridge201855
2Jiaozhou Bay Bridge201141.58
3Lake Pontchartrain Causeway196938.44
4Donghai Bridge200532.5
5King Fahd Causeway198625
6Vasco Da Gama Bridge199817.2
7San Francisco – Oakland Bay Bridge193613.4
8Seven Mile Bridge198210.88
9Øresund Bridge2000> 8
10Mackinac Bridge19578.03
11Golden Gate Bridge19372.7

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world's longest sea bridges - the broad life pinterest board
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18 COMMENTS

  1. Wow, I hope to visit if not all some of these bridges. I think its fascinating to not just know of them but to see them in person too.

  2. Oh Gosh, I would be shaking and telling my kids that I love them while crossing the bridge in Hong Kong.

  3. Honestly Im little bit afraid of water but these sea bridges are adorable. We travel around USA once year and I hope we will see sea bridges one day. Cool experience for boys!

  4. These bridges are all so beautiful! I absolutely love bridges. There is just something magical about them!

  5. I’ve been to three of these bridges. They are so beautiful and I want to see some of these others. I should send this to my sister to freak her out, she hates bridges. LOL

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