Boundary adjustments of 1 square mile or greater were made between the following:
1. Arkansas and Mississippi
2. Arkansas and Oklahoma
3. Arkansas and Tennessee
4. Idaho and Montana
5. Idaho and Oregon
6. Illinois and Missouri
7. Iowa and Nebraska
8. Louisiana and Mississippi
9. Missouri and Nebraska
10. Montana and Wyoming
11. Nebraska and South Dakota
12. Oklahoma and Texas
13. Tennessee and Virginia
14. Texas and Mexico (southern border of Texas)
In addition, some minor adjustments were made to other States.