It is beautiful country with every imaginable land/formation type. Highly recommend it. Supposedly there are more deer there than residents. Of which I believe there is less than 300,000
Wyoming Population Statistics
US Census 2002 Total Population Estimate 498,703*
You had the right idea, but you are some 200,000 short. It's still the least populous state, for Vermonters outnumber Wyomingites.