Gregg County is a county located in the eastern part of the U.S. state of Texas. As of the 2010 census, its population was 121,730. Its county seat is Longview. The county is named after John Gregg, a Confederate general killed in action during the American Civil War.
According to the U.S. Census Bureau, the county has a total area of 276 square miles (710 km), of which 273 square miles (710 km) is land and 2.5 square miles (6.5 km) (0.9%) is water.
As of the census of 2000, there were 111,379 people, 42,687 households, and 29,667 families residing in the county. The population density was 406 people per square mile (157/km²). There were 46,349 housing units at an average density of 169 per square mile (65/km²). The racial makeup of the county was 72.89% White, 19.86% Black or African American, 0.52% Native American, 0.68% Asian, 0.02% Pacific Islander, 4.55% from other races, and 1.49% from two or more races. 9.14% of the population were Hispanic or Latino of any race.
There were 42,687 households out of which 33.50% had children under the age of 18 living with them, 52.00% were married couples living together, 13.50% had a female householder with no husband present, and 30.50% were non-families. 26.10% of all households were made up of individuals and 10.50% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 3.06.
In the county, the population was spread out with 26.70% under the age of 18, 10.30% from 18 to 24, 28.20% from 25 to 44, 21.50% from 45 to 64, and 13.20% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 93.80 males. For every 100 females age 18 and over, there were 90.40 males.
The median income for a household in the county was $35,006, and the median income for a family was $42,617. Males had a median income of $33,186 versus $21,432 for females. The per capita income for the county was $18,449. About 12.00% of families and 15.10% of the population were below the poverty line, including 20.50% of those under age 18 and 11.40% of those age 65 or over.