Washington County is a county in Texas. As of the 2010 census, the population was 33,718. Its county seat is Brenham, which is located on the Brazos River. The county was created in 1835 as a municipality of Mexico and organized as a county in 1837. is named for George Washington, the first president of the United States.
According to the U.S. Census Bureau, the county has a total area of 622 square miles (1,610 km), of which 604 square miles (1,560 km) is land and 18 square miles (47 km) (2.9%) is water.
As of the census of 2000, there were 30,373 people, 11,322 households, and 7,936 families residing in the county. The population density was 50 people per square mile (19/km²). There were 13,241 housing units at an average density of 22 per square mile (8/km²). The racial makeup of the county was 74.68% White, 18.66% Black or African American, 0.27% Native American, 1.21% Asian, 4.02% from other races, and 1.16% from two or more races. 8.71% of the population identified as Hispanic or Latino of any race. 33.6% identified as of German, 6.1% American, 5.7% English, 5.3% Irish and 5.0% Polish ancestry according to Census 2000. 88.1% spoke English, 8.6% Spanish, and 1.2% German as their first language.
There were 11,322 households out of which 31.60% had children under the age of 18 living with them, 54.80% were married couples living together, 11.40% had a female householder with no husband present, and 29.90% were non-families. 25.70% of all households were made up of individuals and 12.90% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 3.05.
In the county, the population was spread out with 24.70% under the age of 18, 11.10% from 18 to 24, 25.30% from 25 to 44, 22.10% from 45 to 64, and 16.90% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 94.70 males. For every 100 females age 18 and over, there were 92.10 males.
The median income for a household in the county was $36,760, and the median income for a family was $43,982. Males had a median income of $31,698 versus $21,346 for females. The per capita income for the county was $17,384. About 9.80% of families and 12.90% of the population were below the poverty line, including 14.80% of those under age 18 and 14.50% of those age 65 or over.