According to the U.S. Census Bureau, the county has a total area of, of which are land and are water. The south and southwestern parts of the county lie in the Galveston Bay Area on the shores of Trinity Bay and East Bay. A small portion of the southeastern area lies on the coast of the Gulf of Mexico.
As of the census of 2000, there were 26,031 people, 9,139 households, and 7,219 families residing in the county. The population density was 43 people per square mile. There were 10,336 housing units at an average density of 17 per square mile. The racial makeup of the county was 81.88% White, 9.77% Black or African American, 0.48% Native American, 0.67% Asian, 6.02% from other races, and 1.18% from two or more races. 10.79% of the population were Hispanic or Latino of any race. There were 9,139 households out of which 40.60% had children under the age of 18 living with them, 65.70% were married couples living together, 9.00% had a female householder with no husband present, and 21.00% were non-families. 17.80% of all households were made up of individuals and 6.70% 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 3.20. In the county, the population was spread out with 28.90% under the age of 18, 8.20% from 18 to 24, 29.90% from 25 to 44, 24.00% from 45 to 64, and 9.00% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 100.60 males. For every 100 females age 18 and over, there were 99.80 males. The median income for a household in the county was $47,964, and the median income for a family was $52,986. Males had a median income of $43,351 versus $25,478 for females. The per capita income for the county was $19,863. About 8.30% of families and 11.00% of the population were below the poverty line, including 13.30% of those under age 18 and 12.60% of those age 65 or over.
Government
Chambers County is governed by the five-member Chamber County Commissioners' Court, consisting of the Chambers County Judge and four County Commissioners. The County Judge is elected to four-year terms in a countywide election. Commissioners are elected to four-year terms from single-member districts.
All elected county offices are represented by Republicans as of 2020 with the retirement of the Precinct 5 Constable Cecil. R. "Popeye" Oldham, a Democrat who was last elected in 2016. Bradley Moon won the Republican primary on March 3, 2020 and had no opponent for the November 3, 2020 General Election.
