The Least Similar State to Every State in the US

1. Hawaii (24), 2. Wyoming (8), 3. New Jersey (4), 4. Texas (3), 5. Mississippi (3)

The Most Similar States to the Rocky Mountain Region

1. Wyoming, 2. Idaho, 3. Montana, 4. Colorado, 5. Utah

The Southern State Most Similar to the West

1. Oklahoma, 2. Texas, 3. Kentucky, 4. Arkansas, 5. North Carolina

Variance in Hydrology by US State

Explanation of the hydrological data used in the State Similarity Index

Similar States with Extremely Different Demographics

These states are similar, except for their demographics

Extremely Different States with Similar Demographics

These states have similar demographics, but little else in common