Grimes County is a county located in the U.S. state of Texas. In 2000, its population was 23,552. The 2006 Census estimate placed the county's population at 25,552. Grimes is named for Jesse Grimes, a signer of the Texas Declaration of Independence and early settler of the county. The seat of the county is Anderson.
There were 7,753 households out of which 34.60% had children under the age of 18 living with them, 55.40% were married couples living together, 12.60% had a female householder with no husband present, and 27.40% were non-families. 23.80% of all households were made up of individuals and 11.20% had someone living alone who was 65 years of age or older. The average household size was 2.69 and the average family size was 3.18.
In the county, the population was spread out with 24.80% under the age of 18, 7.70% from 18 to 24, 29.80% from 25 to 44, 24.00% from 45 to 64, and 13.70% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 117.50 males. For every 100 females age 18 and over, there were 124.00 males.
The median income for a household in the county was $32,280, and the median income for a family was $38,008. Males had a median income of $30,138 versus $21,747 for females. The per capita income for the county was $14,368. About 13.80% of families and 16.60% of the population were below the poverty line, including 20.40% of those under age 18 and 18.10% of those age 65 or over.