 The largest county in Wyoming, Sweetwater County is larger than six states and is the eighth-largest county in the United States (not including boroughs and census areas in Alaska).Most of the Great Divide Basin lies within the county, comprising the county's northeast quadrant.As of the 2000 United States Census, of 2000, there were 37,613 people, 14,105 households, and 10,099 families in the county.