idaho
Montana.
Wyoming is the least populated U.S. state.
Yes, Pennsylvania is the sixth most populated state in the US.
No it is #45 in Area and #49 in population.
Alaska.
Wyoming
With a 2000 population of 544,270 Wyoming is the least populous US state.
Missouri is a US State and contains no states.
Cheyenne is the capital of Wyoming.
Wyoming is the state with the smallest population in the US.
As of 2009 Florida was the fourth most populous state. To see a complete list of all the states and their rankings due to population check out the link I put in the "Related Links" section.