U.S. States with the Longest International Borders

Which ten states of the U.S. share the longest borders with a different country?

Important: Includes LAKE and RIVER borders

Three wrong guesses ends the quiz

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Last updated: April 16, 2026

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First submitted	January 12, 2016
Times taken	45,568
Average score	90.0%
Rating	4.78

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miles	states	km
1538	Alaska	2475
1241	Texas	1997
721	Michigan	1160
611	Maine	983
547	Minnesota	880
545	Montana	877
445	New York	716
427	Washington	687
373	Arizona	600
310	North Dakota	499

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26 Comments

Level 81

Jan 13, 2016

I missed the 5th one grrrr

Level 69

Jan 13, 2016

Oh, welcome to my quiz! Congratulations on your quizes by the way!

Level 81

Sep 5, 2016

Haha, I totally forgot about this quiz. I deleted mine.

Level 69

Sep 5, 2016

Thanks!!!!

Level 60

Feb 15, 2023

lol

Level 68

Jun 20, 2023

I missed Texas and Arizona because I thought it was just Canadian border.

Level 80

Nov 10, 2022

I feel like there's too much time. I've completed the US states speed run (50 states in 60 seconds). Here the challenge is to guess which of the 17 US states with international borders make the top 10 in 90 seconds. Not very challenging. I like the quiz concept, I just think it needs to be fine-tuned.

+17

Level 89

Nov 10, 2022

Maybe you have completed the speed run, but not that many other people have. It’s not a speed quiz anyway, it’s a knowledge quiz.

+10

Level 56

Nov 10, 2022

For non-Americans it is more challenging and need that extra time to visualise where they are located and if they have a border or not

Level 87

Nov 11, 2022

This is a knowledge quiz..If speed typing is your thing there are plenty of them on jetpunk . Some of us are not fast at typing but like doing quizzes so the time on this is fair especially for any non US players.

Level 99

Nov 10, 2022

I got this with 1 second to go! For some reason, Montana wasn't coming to me until the end. Whew!

Level 66

Dec 17, 2022

Alaska almost got me…

Level 52

Dec 17, 2022

Montana looks like it has a huge border so I was surprised to find out Maine's is longer

Level 51

Dec 17, 2022

Not so surprising in fact, as Montana's border is a straight line, while Maine's one is a sinuous arc.

Level 69

Dec 17, 2022

fun and an easy 5 points

Level 58

Dec 17, 2022

As someone from Michigan, I am surprised that we have the third longest international border.

Level 47

Mar 11, 2025

It makes sense though because of the borders with Canada in the Great lakes + Lake St. Clair.

Level 74

Dec 17, 2022

Missing Oklahoma's border with the Republic of Texas

Level 63

Dec 18, 2022

No that border actually isn't long enough to qualify

Its 11th with 309 miles

Level 68

Oct 20, 2024

r/whoooosh?

Level 28

Jun 20, 2024

nyc is for new york city not the state of new york

Level 68

Oct 20, 2024

Was stumped after trying every state on the US-Canada border and still missing two. Remembered Mexico exists with 30 seconds to spare

Level 37

Oct 20, 2024

New mexico?

Level 85

Oct 20, 2024

NM's southern border is mostly blocked by Texas.

Level 55

Oct 21, 2024

I forgot Alaska existed lol

Level 55

May 1, 2025

I completely missed the 1st state in this quizz ...!