As of the census of 2000, 20,814 people resided in the county, organized into 8,521 households, and 6,083 families. The population density was 20 people per square mile (8/km2). The 9,902 housing units averaged nine per square mile (four per km2). The racial makeup of the county was 92.82% White, 0.33% Native American, 0.21% Black or African American, 0.18% Asian, 0.02% Pacific Islander, 5.27% from other races and 1.18% from two or more races. About 15.90% of the population was Hispanic or Latino of any race. In terms of ancestry, 40.8% were of German, 10.3% were of English, 10.0% were of Irish, 6.0% were of American, 3.1% were of Scotch-Irish, 2.5% were of Scottish,2.5% were of French. In 1990, about 3,000 speakers of Texas German were in Gillespie and Kendall Counties, but this is believed to have declined since.