There are only 50 states in the US, but perhaps you were thinking of Washington, D.C. or Puerto Rico. Here is a list of the 50 States, D.C., and Puerto Rico, ranked by population:
Yes, Pennsylvania is the sixth most populated state in the US.
America has 51 states
The 5 least populated states are: Wyoming Vermont North Dakota Alaska South Dakota
There are 50 states in the United States.
The US only has 50 States.
51
There are only 50 states, period. Other US possessions, such as Puerto Rico or the US Virgin Islands, are known as US Territories.
There are 50 states in the US, not 51. Go to link for details.
Georgia is the 9th most populated of the US States.
Missouri is a US State and contains no states.
It is the 6th most populated of the US States.
California is the most populated state with a population of 37,691,912 as of 2011. The most densely populated state is New Jersey, with a population density of about 460/km2.