U.S. States with the Longest Straight Borders

If you look at map of the United States, you'll notice that many states have long straight border lines. Do you know which 12 have the longest?
Water borders aren't included
Circle borders (DE-PA) aren't included as well
I wasn't sure about the Alaska Panhandle borders, so I didn't include it
Quiz by Gassu
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Last updated: August 26, 2017
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First submittedAugust 26, 2017
Times taken379
Average score83.3%
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Length (km)
Length (mi)
% of the Total Border
U.S. State
2,353 km
1,462 mi
98.3%
New Mexico
2,103 km
1,307 mi
100%
Colorado
2,094 km
1,301 mi
90.0%
Nevada
2,047 km
1,272 mi
69.0%
Montana
2,029 km
1,261 mi
100%
Wyoming
1,973 km
1,226 mi
100%
Utah
1,805 km
1,122 mi
90.0%
Kansas
1,734 km
1,077 mi
74.3%
Arizona
1,657 km
1,030 mi
66.8%
Oklahoma
1,580 km
982 mi
78.0%
South Dakota
1,531 km
951 mi
80.5%
California
1,528 km
949 mi
80.1%
Nebraska
8 Comments
+2
Level 70
Aug 26, 2017
The states with the shortest straight borders are Hawaii (0) and New Jersey (77km/48mi)
+1
Level 47
Aug 27, 2017
I think Alaska should be included, personally.
+1
Level 72
Feb 17, 2021
I checked it quite precisely and the Canadian-Alaskan border is actually only made out of strait lines. The think ist that they've selected an enormous amount of mountains and drew straight lines between them. So even if it looks a little more geographic, it still never follows any single geographical feature like a river or a ridge. So alaska would be just first with 1538 mi.
+1
Level 67
Nov 5, 2021
I know it doesn't come close to the distance needed to be on the quiz, but Maine also has a border with Canada that appears to be a bunch of small straight lines but personally I would not consider that section of the border to be straight. (Additionally many European borders are a conglomeration of small straight lines.) I think even if the small straight lines are between chosen points it doesn't necessarily make that section of border a straight line. I am in the camp that would consider most of the Alaskan panhandle border to not be straight.
+1
Level 67
Nov 5, 2021
I had an idea for this exact quiz about a year ago, but I never made it happen. I love the concept! I am wondering how you got the percentages though. How did you measure the distance for the non-straight sections?
+1
Level 42
Nov 20, 2021
FLORIDA and GEORGIA SHOULD be accepted, as they both NOT ONLY BORDER EACHOTHER, BUT ALSO THEY SHARE a LONG Border with ALABAMA! TENNESSEE SHOULD ALSO BE ACCEPTED. This is NOT an accurate quiz w/o them. Montana too. ALASKA has a STRAIGHT BORDER WITH CANADA, SO DOES MONTANA! I reckon you do that. Yes, they may have water borders, but literally they also border other countries and states, and they're long borders still. Tennessee SHOULD BE ACCEPTED WITH NO EXCEPTIONS! ITS LITERALLY LANDLOCKED AND IT HAS NO PANHANDLES! Tennessee is like a panhandle itself. As an American from Georgia, and family in Tennessee, Georgia, Florida, Montana, and Alaska, I feel obligated to criticize this quiz w/ my dad as much as I can.
+1
Level 42
Nov 20, 2021
My bad, Montana has it's credits. But still. Don't take away wAtEr BoRdErInG StAtEs
+1
Level 42
Nov 20, 2021
No water border is straight btw. Atleast in the U.S.