How far is it from northern border to southern border?

Question: How far is it from northern border to southern border?

Answer: The north-south distance varies according to the state. The state of Texas has the greatest north-south distance, at 800 miles (1,300 km). The shortest north-south distance is in Iowa, at 200 miles (320 km). The average north-south distance in the contiguous United States is 500 miles (800 km).