Wyoming's Population

  2010 563,626  
  2000 493,782  
  1990 453,588  
  1980 469,557  
  1970 332,416  
  1960 330,066  
  1950 290,529  
  1940 250,742  
  1930 225,565  
  1920 194,402  
  1910 145,965  
  1900 92,531  
  1890 62,555  
  1880 20,789  
  1870 9,118  

Source: U. S. Department of Commerce, Bureau of the Census