2020 census As of the
2020 census, the county had a population of 372,031 and a median age of 36.9 years; 25.8% of residents were under the age of 18 and 12.9% of residents were 65 years of age or older. For every 100 females there were 100.7 males, and for every 100 females age 18 and over there were 99.5 males age 18 and over. There were 127,464 households in the county, of which 39.7% had children under the age of 18 living in them. Of all households, 55.5% were married-couple households, 16.0% were households with a male householder and no spouse or partner present, and 23.1% were households with a female householder and no spouse or partner present. About 20.9% of all households were made up of individuals and 7.7% had someone living alone who was 65 years of age or older.
Racial and ethnic composition In the late 1800s, the county was majority black as many were former slaves who had worked on plantations in the county. In 1882, it had 8,219 black people and 3,642 white people. However, after
Jim Crow laws were cemented, many African-Americans moved to Houston and the county became majority white. Since the 2020 U.S. census, due to the growth of ethnic minorities in
Pearland, the county is now
majority minority.
2010 census According to the
2010 United States census, 313,166 people were living in the county; by 2020, its population grew to 372,031. The
population density was . The 90,628 housing units averaged . Of the 81,955 households in 2000, 40.80% had children under the age of 18 living with them, 62.20% were married couples living together, 10.40% had a female householder with no husband present, and 23.00% were not families. About 19.10% of all households were made up of individuals, and 6.40% had someone living alone who was 65 years of age or older. The average household size was 2.82, and the average family size was 3.23. In the county, the age distribution was 28.60% under 18, 8.60% from 18 to 24, 32.40% from 25 to 44, 21.50% from 45 to 64, and 8.80% who were 65 or older. The median age was 34 years. For every 100 females, there were 107 males. For every 100 females age 18 and over, there were 107.4 males. The median income for a household in the county was $48,632, and for a family was $55,282. Males had a median income of $42,193 versus $27,728 for females. The
per capita income for the county was $20,021. About 8.1% of families and 10.2% of the population were below the
poverty line, including 12.6% of those under age 18 and 8.7% of those age 65 or over. In 2000, the
racial makeup of the county was 77.09% White, 8.50% Black or African American, 0.53% Native American, 2.00% Asian, 9.66% from other races, and 2.22% from two or more races. About 22.78% of the population were
Hispanic or Latino of any race. About 12.1% were of
German, 11.2%
American, and 7.2%
English ancestry according to 2000's census; about 79.0% spoke only
English at home, while 18.1% spoke
Spanish. ==Government and politics==