Bandera County is a county located on the Edwards Plateau in the U.S. state of Texas. As of the 2010 census, the population is 20,485. Its county seat is Bandera. The county was formed in 1856 from Bexar and Uvalde counties. The county and its seat are named for Bandera Pass, which in turn uses the Spanish word for flag.
According to the U.S. Census Bureau, the county has a total area of 798 square miles (2,070 km), of which 791 square miles (2,050 km) is land and 6.7 square miles (17 km) (0.8%) is water.
As of the 2010 United States Census, there were 20,485 people residing in the county. 92.8% were White, 0.8% Native American, 0.5% Black or African American, 0.3% Asian, 3.8% of some other race and 1.8% of two or more races. 16.7% were Hispanic or Latino (of any race). 17.6% were of German, 13.7% English, 10.2% Irish and 10.1% American ancestry.
As of the census of 2000, there were 17,645 people, 7,010 households, and 5,061 families residing in the county. The population density was 22 people per square mile (9/km²). There were 9,503 housing units at an average density of 12 per square mile (5/km²). The racial makeup of the county was 94.02% White, 0.33% Black or African American, 0.90% Native American, 0.28% Asian, 0.06% Pacific Islander, 2.55% from other races, and 1.86% from two or more races. 13.51% of the population were Hispanic or Latino of any race.
There were 7,010 households out of which 29.10% had children under the age of 18 living with them, 60.80% were married couples living together, 7.30% had a female householder with no husband present, and 27.80% were non-families. 23.20% of all households were made up of individuals and 9.90% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 2.92.
In the county, the population was spread out with 24.70% under the age of 18, 5.80% from 18 to 24, 25.70% from 25 to 44, 27.60% from 45 to 64, and 16.20% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 99.00 males. For every 100 females age 18 and over, there were 98.30 males.
The median income for a household in the county was $39,013, and the median income for a family was $45,906. Males had a median income of $31,733 versus $24,451 for females. The per capita income for the county was $19,635. About 7.70% of families and 10.80% of the population were below the poverty line, including 12.20% of those under age 18 and 9.40% of those age 65 or over.