Perimeter Of United States

The United States, comprising 50 states, is a vast and geographically diverse country. When considering its perimeter, it's essential to account for its complex border with neighboring countries and its extensive coastline along the oceans. The perimeter of the United States is a critical aspect of its geography, influencing various factors such as national security, trade, and environmental conservation.
To understand the perimeter of the United States, it's crucial to differentiate between its land borders and coastline. The country shares land borders with Canada to the north and Mexico to the south. The U.S.-Canada border is the longest international border in the world, spanning approximately 8,891 kilometers (5,525 miles). In contrast, the U.S.-Mexico border is significantly shorter, covering about 3,201 kilometers (1,989 miles). These land borders are marked by a variety of terrain, including forests, deserts, and mountain ranges, which pose unique challenges for border management and security.
Key Points
- The United States has a total perimeter of approximately 17,820 kilometers (11,070 miles), including its land borders and coastline.
- The U.S.-Canada border is the longest international border in the world, spanning about 8,891 kilometers (5,525 miles).
- The U.S.-Mexico border covers approximately 3,201 kilometers (1,989 miles).
- The coastline of the United States, including the Atlantic, Pacific, Arctic, and Gulf Coasts, stretches for about 12,383 kilometers (7,693 miles).
- The perimeter of the United States plays a critical role in national security, trade, and environmental conservation.
Land Borders of the United States

The land borders of the United States are a vital component of its perimeter. As mentioned earlier, the country shares borders with Canada and Mexico. These borders are not only significant for national security but also for trade and cultural exchange. The U.S.-Canada border, for instance, is one of the busiest borders in the world, with millions of people and goods crossing every year.
U.S.-Canada Border
The U.S.-Canada border is a unique aspect of the perimeter of the United States. It is not only the longest international border but also one of the most peaceful. The border is marked by a variety of landscapes, including the Rocky Mountains, the Great Plains, and the forests of the northeastern United States. The border also includes several major rivers, such as the Rio Grande and the Saint Lawrence River, which pose challenges for border management and security.
The U.S.-Canada border is also significant for trade and cultural exchange. The two countries have a long-standing relationship, with billions of dollars' worth of goods crossing the border every year. The border is also home to several major cities, including Detroit, Michigan, and Buffalo, New York, which have strong economic and cultural ties to Canada.
U.S.-Mexico Border
The U.S.-Mexico border is another critical component of the perimeter of the United States. The border spans approximately 3,201 kilometers (1,989 miles) and is marked by a variety of terrain, including deserts, mountains, and rivers. The border is also home to several major cities, including San Diego, California, and El Paso, Texas, which have significant economic and cultural ties to Mexico.
The U.S.-Mexico border is a complex and often contentious issue, with debates over immigration, trade, and national security. The border is also home to several major ports of entry, including the San Ysidro Port of Entry, which is one of the busiest land border crossings in the world.
Coastline of the United States

The coastline of the United States is another vital component of its perimeter. The country has a extensive coastline along the Atlantic, Pacific, Arctic, and Gulf Coasts, stretching for approximately 12,383 kilometers (7,693 miles). The coastline is marked by a variety of landscapes, including beaches, cliffs, and mangroves, which provide habitat for a diverse range of marine life.
The coastline of the United States is also significant for trade and commerce. The country has several major ports, including the Port of Los Angeles and the Port of New York and New Jersey, which are among the busiest ports in the world. The coastline is also home to several major naval bases, including the Naval Base San Diego and the Naval Station Norfolk, which play a critical role in national security.
Coastline Segment | Length (km) |
---|---|
Atlantic Coast | 2,069 |
Pacific Coast | 3,794 |
Arctic Coast | 1,057 |
Gulf Coast | 1,680 |
Total Coastline | 12,383 |

Implications of the Perimeter of the United States
The perimeter of the United States has significant implications for national security, trade, and environmental conservation. The country’s land borders and coastline are critical for preventing illegal activities, such as smuggling and human trafficking, and for facilitating legitimate trade and commerce. The perimeter is also vital for protecting the country’s natural resources, including its forests, wildlife, and marine ecosystems.
The perimeter of the United States is also significant for its impact on local communities and economies. The country's border regions are often characterized by unique cultural and economic profiles, with strong ties to neighboring countries. The perimeter is also home to several major cities, including San Diego, California, and El Paso, Texas, which have significant economic and cultural ties to Mexico.
What is the total length of the perimeter of the United States?
+The total length of the perimeter of the United States is approximately 17,820 kilometers (11,070 miles), including its land borders and coastline.
What is the longest international border in the world?
+The U.S.-Canada border is the longest international border in the world, spanning approximately 8,891 kilometers (5,525 miles).
What is the significance of the coastline of the United States?
+The coastline of the United States is significant for trade and commerce, as well as for national security and environmental conservation. The coastline stretches for approximately 12,383 kilometers (7,693 miles) and is home to several major ports and naval bases.
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