 Parmer County was one of 10 prohibition, or entirely dry, counties in the state of Texas, but is now a wet county.According to the U.S. Census Bureau, the county has a total area of , of which are land and (0.5%) are covered by water.As of the census of 2000, 10,016 people, 3,322 households, and 2,614 families resided in the county.