Oh, dude, North Dakota is the bigger sibling here. It's got more square miles than South Dakota. So, if you're into vast open spaces and endless fields, North Dakota is your jam. But hey, they're both pretty chill, just like me.
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South Dakota has more square miles than North Dakota.
South Dakota has an area of 77,116 square miles and is ranked as the 17th largest US State. North Dakota is the 19th largest US State at 70,700 square miles.