How Long Is The US Mexico Border (And Why)?

How Long Is The US Mexico Border (And Why)?

Exact Answer: 3,145 kilometers

The world is a very large, diverse place with 8 continents and thousands of countries. Some borders split up the countries and states. The geography is huge, confusing and the world consists of terrains, hills, mountains, plains, seas, lakes, and oceans.

There are borders between cities, states, countries, and even continents. Borders were built to keep enemies and invaders out of the country and to split up the states. The border between two places is not always a continuous line. The border can be of any size, length, and flow.

There is no consistent over the length, and sometimes even disputes occur over splitting up the location. Wars have happened at times when people cross certain borders unauthorized.

How Long Is The US Mexico Border

How Long Is The US-Mexico Border?

Length3145 kms
Established in a treaty on1819

The Mexico-United States border is called Frontera Mexico-Estados Unidos in Spanish. It is the international border that separates Mexico from the united states. This border extends from the pacific ocean in the east and the Gulf of Mexico in the west.

The border goes through multiple terrains, urban areas, and even deserts. According to facts, it is the most frequently crossed border in the world and about 350 million crossings are recorded annually. It is also the tenth longest border between two countries.

The length of the border is 3,145 kilometers, which is 1,954 miles. It was first built on December 30, 1853, and it was mentioned to be built in many older treaties like the Gadsden Purchase, Treaty of Guadalupe Hidalgo, and Adams-Onis Treaty.

The border begins in the Gulf of Mexico, and it flows through the Rio Grande, and it crosses Ciudad Juarez, Chihuahua, and Texas through the way. On the west side, it crosses the Sonoran and Chihuahuan, the San Diego-Tijuana and Colorado River Delta before it reaches the Pacific Ocean.

Most of the border lies in the Rio Grande, and the edges end in Texas. The maritime boundaries are excluded, which contain 18 miles in the Pacific Ocean and 12 miles in the Gulf of Mexico, according to geographical maps. According to US customs and border protection, the length of the border is around 1,900 miles.

Why Is The US-Mexico Border That Long?

The US customs agency patrols this border and hence they use a rounded-off number. According to the Government Accountability Office, the length is 1,991 or 1,954, this number is based on the recent reports that were published by the border security. On the other hand, the US census and congressional research office use the figure 1,933 and a ubiquitous figure of about 1,989 miles. Online blogs and websites like Wikipedia use this number.

The length of the border depends on various factors and it has changed in values that are not even noticeable. The satellite images have helped a lot in mapping the images, boundaries and even video maps are available. After the purchase of Louisiana by the USA, the border between the USA and New Spain wasn’t that clear nor defined. The border was hence established in the Adams-Onis treaty between New Spain and the USA.

There are 48 US-Mexico border crossings and 330 ports of entry. At these points, the people must open their bags for the border patrol to inspect the content in the bags. The border crossings normally happen in the roads, ferries, railroads, and pedestrian walkways along the span of the border. There are many cross-border municipalities, which are connected by legal border crossings along the way.


There are various reasons why the US-Mexico border was first created. It was first built for security reasons and it acts as a barrier between the two countries. The disputes caused by various reasons were also controlled and according to the news articles, in 2010, President Barack Obama signed a bill of 600 million dollars and this was specifically assigned for border security needs.

The US government assigned a lot of money, in millions, to help the border security, and yet, undocumented immigration did not stop after all the border security policies. In 2018, the US government implemented the facial recognition system to keep an eye on immigrants.


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