Which country borders Canada on the south?
Quick answer: United States of America. In our practice tests 90% of 106 answers were correct, and the most common mistake is choosing “Mexico”.
Why is this the correct answer?
The United States borders Canada on the south (and northwest via Alaska). The two countries share the longest international border in the world at 8,891 kilometres.
Study Tip
Think about the geographic location of Canada and its neighboring countries. The country you're looking for is a large nation that shares a long border with Canada.
What should you know about this topic?
Canada is bordered on the south by the United States of America. Discover Canada describes the Canada-U.S. border as the world's longest undefended border. It stretches across the continent from the Atlantic to the Pacific, and also runs between Yukon and the U.S. state of Alaska in the northwest. Canada also borders three oceans: the Pacific to the west, the Atlantic to the east and the Arctic to the north.
Canada and the United States have one of the closest friendships and largest trading relationships in the world. Discover Canada notes that Canada enjoys close relations with the United States and that the two countries share a long history, including working together in the World Wars and in defending North America. Many Canadians live near the southern border, and millions of people and huge amounts of goods cross it every year.
This question connects to test topics such as Canada's geography and regions, trade agreements like NAFTA and the agreements that followed, and Canada's history, including the War of 1812, when Canada was defended against an American invasion. Mexico is also a North American country and a trade partner, but it does not border Canada. Central America is a region south of Mexico, and Washington is a U.S. state and the name of the U.S. capital, not a country. Canada is the second-largest country in the world by land area.
Why are the other answers wrong?
- Mexico: Mexico is a North American trade partner but borders the United States, not Canada.
- Washington: Washington is a U.S. state (and the U.S. capital city's name), not a country.
- Central America: Central America is a region south of Mexico; it does not border Canada.
What is the most common mistake?
Some learners choose Mexico because it is a NAFTA partner. Mexico shares a border with the United States, not with Canada.
How can you remember the answer?
Look at a map: Canada sits on top of the U.S. like a hat, so the U.S. is right below, on the south.
Original data
How many people get this question right?
90% of 106 practice answers from about 76 people were correct. The most common wrong answer is "Mexico", chosen 6% of the time. The data covers practice tests on BecomeACitizen.ca from March 31, 2026 to September 30, 2026.
How hard is this question compared with others?
It is the 35th easiest of the 167 questions we have enough data to rank. The average for the Canada's Regions chapter is 78% correct, and the average across all questions is 75%. You need 75% to pass the real test.
These are practice questions written from the official Discover Canada guide. IRCC does not publish the real test questions. See the full ranking in the 20 most-missed citizenship test questions or browse more Canada's Regions questions.
Practice This Chapter
Test yourself with questions from Canada's Regions. Timed mock tests, instant scoring, and detailed explanations.
Which part of Discover Canada is this question from?
This question is from the Canada's Regions section of the Canadian citizenship test. The test consists of 20 multiple-choice questions drawn from the official Discover Canada study guide. You need to score at least 75% (15 out of 20 correct) to pass.
This chapter has 35 questions in our database. Studying chapter by chapter is one of the most effective ways to prepare, as it helps you build deep understanding of each topic before moving to the next.
How should you study for the citizenship test?
Start by reading the complete how-to-pass guide, then work through each chapter in the study mode. When you feel ready, take a full exam simulation with the real 45-minute time limit.