Brazos County (/ˈbræzəs/ (listen) BRAZ-əs) is a county located in the U.S. state of Texas. As of the 2010 census, its population was 194,851. The population estimate as of November 2018 was 226,099. The county seat is Bryan. Along with Brazoria County, the county is named for the Brazos River, which forms its western border. The county was formed in 1841 and organized in 1843.
According to the U.S. Census Bureau, the county has a total area of 591 square miles (1,530 km), of which 585 square miles (1,520 km) is land and 5.8 square miles (15 km) (1.0%) is water.
As of the census of 2000, there were 152,415 people, 55,202 households, and 30,416 families residing in the county. The population density was 260 people per square mile (100/km²). There were 59,023 housing units at an average density of 101 per square mile (39/km²). The racial makeup of the county was 74.45% White, 10.72% Black or African American, 0.36% Native American, 4.01% Asian, 0.07% Pacific Islander, 8.42% from other races, and 1.97% from two or more races. 17.88% of the population were Hispanic or Latino of any race. 15.3% were of German, 8.4% English, 7.3% Irish and 7.2% American ancestry according to Census 2000.
There were 55,202 households out of which 27.90% had children under the age of 18 living with them, 41.30% were married couples living together, 10.00% had a female householder with no husband present, and 44.90% were non-families. 25.50% of all households were made up of individuals and 5.00% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 3.16.
In the county, the population was spread out with 21.50% under the age of 18, 32.00% from 18 to 24, 26.00% from 25 to 44, 13.80% from 45 to 64, and 6.70% who were 65 years of age or older. The median age was 24 years. For every 100 females, there were 102.10 males. For every 100 females age 18 and over, there were 100.30 males.
The median income for a household in the county was $29,104, and the median income for a family was $46,530. Males had a median income of $32,864 versus $24,179 for females. The per capita income for the county was $16,212. About 14.00% of families and 26.90% of the population were below the poverty line, including 21.60% of those under age 18 and 10.30% of those age 65 or over.