That's 26% of US states, but potentially much more than 26% of the US population (have not computed, but Texas, New York, Florida and, to a lesser extent, Washington all have large populations).
2. Texas
4. Florida
5. New York
9. Georgia
10. North Carolina
A quick check to https://en.wikipedia.org/wiki/List_of_states_and_territories... gave me ~38% of the US population