The smallest state by population is Wyoming, with a population of only 576,412, roughly the same population as the county of Essex, UK! The region of the western United states is very mountainous, which explains why there aren't many large cities in this part of the world.
The second least-populated state is Vermont, this state has a population of 262,011 and is situated in the "New England" region of the United States. It is the only New England state that is not bordering the Ocean.
The third smallest state by population is North Dakota, with a population of 699,628 people. It borders Canada and also unsurprisingly, South Dakota.
The forth state on the list is Alaska, which has a population of 731,449. It is situated in the North West extremity of the North American continent, bordering Canada. It is actually the largest state in terms of area, but the extreme climate and its isolated geographic location makes it a tricky place to live.
The fifth smallest is South Dakota with 833, 354. It is situated in the mid-west of the United States. It is split in half by the Missouri river, one side known as East River and one as West river.